Get Supplemental Help

If you're in your thirties or forties and you don't take at least a multivitamin, start taking one today! A large body of research shows that taking vitamin and mineral supplements over a long period of time significantly supports better health.

Calcium and vitamin D are two of the most important supplemental nutrients, helping to build stronger bones now that can withstand the bone-loss effects of aging.

Calcium can also help keep your weight down. One study of younger women found that for every extra 300 milligrams of calcium a day they consumed, they weighed about two pounds less (Experimental Biology 2003 meeting, San Diego).

In the same way, taking vitamin D supplements not only helps strengthen your bones, it can also lower your risk of multiple sclerosis (Neurology 1/13/04). In this study, which looked at the health records of more than 180,000 women for up to 20 years, taking D supplements dropped the chances of multiple sclerosis (although eating vitamin D-rich foods did not have the same benefit). And if you're thinking about having children at this age, a multivitamin is crucial for lowering your baby's risk of birth defects and other health problems. A study at the University of North Carolina at Chapel Hill found that women who take multivitamins during pregnancy lower their children's risk of nervous system cancer by up to 40% (Epidemiology 9/02).

" Our finding, combined with previous work on reducing several birth defects with vitamin supplementation and other childhood cancers, supports the recommendation that mothers' vitamin use before and during pregnancy may benefit their babies' health," says Andrew F. Olshan, MD, professor of epidemiology at the UNC School of Public Health. "We believe physicians and other health care providers should continue to educate women about these benefits and recommend appropriate dietary habits and daily dietary supplements."

In particular, Dr. Olshan feels that folic acid (one of the B vitamins), and vitamins C and A, are particularly important for lowering the risk of childhood cancers and birth defects.

Ages 45 to 55

When you reach this in-between age-the time when most women have moved past childbearing age but haven't usually fully moved into the post-menopausal stage-you enjoy a propitious opportunity to take stock of your health and plan for an even healthier future. One thing that may need adjustment is your sleep habits, as sleeplessness is a common problem for women in this age group. Even if you haven't been exercising or watching your diet until now, it's not too late to start. Making lifestyle changes at this age can still improve your chances for aging successfully.

For instance, it is at these ages that women should have their heart health checked. Research published in the journal Stroke (5/01) shows that having your cholesterol and blood pressure checked at this time more accurately shows your future chances of heart disease than having it checked at a later date after menopause, in your late fifties.

" The premenopausal risk factors may be a stronger predictor of carotid atherosclerosis [artery blockages] because they represent cumulative risk factor exposure during the premenopausal years, whereas the risk factors...during the early postmenopausal years have a shorter time for influence," says Karen A. Matthews, PhD, a professor at the University of Pittsburgh Medical Center. In other words, Dr. Matthews' research shows that if you have high blood pressure and high cholesterol before menopause, you are at serious risk for a stroke or heart attack soon after menopause: These are important reasons that you need to start improving your health habits immediately.

Increase in Heart Disease

Before menopause, a woman's hormones and other physiological characteristics usually hold down her chance of heart disease. After menopause, when hormones and other bodily changes occur, the risk of heart attacks and stroke in women rises significantly. (Heart disease is the leading killer of women.) At least part of this increased risk is linked to the postmenopausal decrease in estrogen production.

Dr. Matthews studied about 370 women in their late forties, measuring their weight, their BMI (body mass index, an indication of body fat compared to height), blood pressure, cholesterol and blood sugar. Ten years later, after the women had entered menopause, she and her fellow scientists used ultrasound to measure blockages in these women's neck arteries (a sign of heart disease).

The researchers found that indications of potential heart problems (such as high blood pressure, high cholesterol and being overweight) when women were in their forties did indeed forecast future difficulties.

" Women who had elevated cholesterol, higher blood pressures and increased body weight before menopause had increased blood vessel thickening and atherosclerotic plaque formation in the neck arteries after menopause. Such changes in the carotid arteries are associated with an increased heart attack and stroke risk," says Dr. Matthews.

Heart Health Factors

The four main lifestyle factors you should adjust at this age to support better heart function are diet, stress, exercise and weight. According to Dr. James Williams, "[M]ore than any other cause, dietary factors are the most critical factor in cardiovascular disease." He recommends eliminating "dietary saturated fatty acids as found in flame-broiled and fried meats." He also urges women to eat more fish and poultry, consume organic fruits and vegetables and cut back on refined sugar.

Stress becomes an ever more important heart disease factor at this age as estrogen begins to drop.

" Our study [in the lab] indicates that stress affects estrogen levels and can lead to the development of heart disease-even before menopause," says Jay Kaplan, PhD, of the Wake Forest University Baptist Medical Center (The Green Journal 3/02).

Dr. Kaplan's research shows that stress in women ages 45 to 55 may reduce estrogen earlier in life and make women more susceptible to the arterial blockages that lead to heart disease. "We know from [lab] studies that stress can lower estrogen levels to the point that health is affected," he says.

Stress can also hurt bone health: In a study of 66 women with normal-length menstrual periods, estrogen levels were low enough in half of the women to cause bone loss, making the women susceptible to osteoporosis.

Exercise and Weight

Although exercise used to be considered to be mainly a young woman's activity, the thrust of recent research suggests that physical activity actually becomes more important to health as you get older.

A 17-year study of about 10,000 Americans found that exercising and keeping your weight down is probably the most important thing you can do to lower your risk of heart disease as you enter your forties and fifties (Am J Prev Med 11/03).

Of the people who took part in this study, more than 1,500 people died of heart disease. Those who performed the most exercise were thinner and had a 50% chance less of dying of heart disease than overweight nonexercisers.

" The fact is that those who both exercised more and ate more nevertheless had low cardiovascular mortality," says Jing Fang, MD, a researcher at the Albert Einstein College of Medicine in the Bronx, New York.

An added benefit of exercise: If you burn up calories exercising, you can eat more and not have to worry as much about being overweight.

Supplements and Diet

If you're a woman at midlife, a multivitamin and mineral is still good nutritional insurance. Eating plenty of fruits and vegetables are also important for getting enough phytochemicals, the health substances in plants that convey a wealth of health benefits.

As you enter this age group, your immune system gradually slows down. To help support immune function, eating produce rich in antioxidant nutrients, and supplementing with antioxidants like vitamins C and E as well as carotenoids, can be especially important. For example, a study of people with ulcers found that people with less vitamin C in their stomachs are more likely to be infected with Helicobacter pylori, the bacteria that can cause peptic ulcers and is linked to stomach cancer (J Amer Coll Nutr 8/1/03).

This research, which looked at the health of about 7,000 people, found that vitamin C probably helps the immune system fend off this bacterial infection.

" Current public health recommendations for Americans are to eat five or more servings of fresh fruits and vegetables a day to help prevent heart disease, cancer and other chronic diseases," says Joel A. Simon, MD, MPH, professor of medicine at the University of California at San Francisco.

Calcium and Bones

At midlife, calcium continues to be a vital mineral for supporting bone health.

According to Gameil T. Fouad, PhD, "It has been routinely shown that a woman's calcium status and level of physical activity (specifically, the degree to which she participates in weight-bearing exercise) are positively associated with bone mineral density. It is less well appreciated that this is a process which takes place over the course of a lifetime."

Dr. Fouad adds that calcium works in concert with other vitamins and minerals to keep bones healthy: "Research in the United Kingdom involving nearly 1,000 premenopausal women over age 40 illustrates those women with the highest bone density tended to have the highest intake of calcium. Surprisingly, this study also demonstrated that calcium does not act alone: those women with the best bone health also had the highest intakes of zinc, magnesium and potassium."

Dr. Fouad stresses that supplements should go together with a lifestyle that includes enough sleep and exercise to help the body stay in top shape.

" As a general guideline," he says, "a woman concerned with her mineral intake should take concrete steps to make sure she is getting adequate rest, is eating a well-balanced diet focused on fresh fruits, vegetables and lean protein as well as getting adequate exercise....A multi-mineral containing bio-available forms of zinc, magnesium, copper and selenium is probably a safe addition to anyone's routine. Taking these proactive steps dramatically reduces the chances that deficiencies will arise."

Ages 55 and Beyond

Entering the post-menopausal phase of life can present challenging opportunities for a new perspective on life and health. While some signs of aging are inevitable, experts who have looked at how the human body changes with age are now convinced that healthy lifestyle habits can improve how well you can think, move and enjoy life well past age 55.

As Dr. Williams notes, "In your fifties, the force of aging is undeniably present: Your body shape changes and organ function declines, both men and women have a tendency to gain weight....Heart disease becomes more common, energy and endurance are considerably reduced and your memory begins to slip."

But Dr. Williams also points out that you don't have to age as rapidly as other people do. He believes you should employ a "natural longevity program...[that starts] to reverse the course of aging as early as possible."

One key to staying vital as you age is your outlook on life, an aspect of life that's greatly enhanced by strong social ties.

Avoiding the Aging Slowdown The latest research shows that one of the most crucial ways to slow the effects of aging is to exercise and keep your weight down. It won't necessarily be easy, though. The change in hormonal balance at this age makes the body more prone to extra pounds (Society for Neuroscience Meeting, 11/12/03).

" In women, it has been demonstrated that major weight increases often occur during menopause, the time in a woman's life in which cyclic ovarian function ends and the ovarian hormones estrogen and progesterone decline," says Judy Cameron, PhD, a scientist in the divisions of reproductive sciences and neuroscience at the Oregon Health & Science University.

In Dr. Cameron's lab trials, she has found that the decrease in estrogen after menopause "resulted in a 67% jump in food intake and a 5% jump in weight in a matter of weeks."

In other words, the hormonal changes you undergo as enter your late fifties causes your appetite to grow as well as your waistline: Developments that increase your chances of heart disease, cancer, diabetes, stroke and joint problems.

Vigilance against this weight gain is necessary to save your health: Start walking and exercising. Research on exercise in people aged 58 to 78 found that getting off the couch for a walk or other physical activity not only helps control weight but also helps sharpen your thinking and helps you become more decisive (Proceedings of the National Academy of Sciences, 2/16-20/04, online edition). This recent study, done at the University of Illinois at Urbana-Champaign, found that performing aerobic exercise improved mental functioning by 11% (on a computer test).

" We continue to find a number of cognitive benefits in the aerobic group," says Arthur F. Kramer, PhD, a professor of psychology at the Beckman Institute for Advanced Science and Technology at Illinois. "The brain circuits that underlie our ability to think-in this case to attend selectively to information in the environment-can change in a way that is conducive to better performance on tasks as a result of fitness." In simple terms, that means that walking at least 45 minutes a day boosts brain power as well as protecting your heart.

An Herb for Menopause

The physical changes that accompan> y menopause can be uncomfortable. But traditional herbal help is available: Black cohosh (Cimicifuga racemosa), an herb used for eons by aging women, has been shown in recent studies to be both safe and effective (Menopause 6/15/03).

" This [research] should reassure health professionals that they can safely recommend black cohosh to their menopausal patients who cannot or choose not to take HRT [hormone replacement therapy]," says researcher Tieraona Low Dog, MD, Clinical Assistant Professor at the University of New Mexico Department of Family and Community Medicine.

While HRT has been used to help women cope with menopause, a flurry of studies in the past few years have shown that HRT increases the risk of heart disease and cancer. Instead, black cohosh, which alleviates such menopausal discomforts as hot flashes, has been shown to be much safer.

Keeping Track of Crucial Vitamins

While continuing to take multivitamins and minerals at this age is important, some experts believe that as we grow older, vitamin D supplementation, as well as taking antioxidant nutrients, is particularly vital. Arthritis is a common affliction of aging, and rheumatoid arthritis (RA) is one particularly destructive form of this joint problem. But taking vitamin D can significantly lower your risk of this condition.

When scientists analyzed the diets of 30,000 middle-aged women in Iowa over 11 years, they found that women who consumed vitamin D supplements were 34% less likely to suffer RA (Arth Rheu 1/03).

Other vitamins are equally important to an older woman's well-being. For example, vitamins C and natural E have been found to lower the risk of stroke in those over the age of 55 (Neurology 11/11/03). In this study, smokers who consumed the most vitamin C and natural vitamin E were 70% were much less likely to suffer strokes than smokers whose diets were missing out on these vitamins.

Rich sources of vitamin C in food include oranges and other citrus fruits, strawberries, red and green peppers, broccoli and brussels sprouts. Sources of vitamin E include vegetable oils such as sunflower seed, cottonseed, safflower, palm and wheat germ oils, margarine and nuts.

Saving Your Sight

After age 55, your eyes are particularly vulnerable. Eight million Americans of this age are at risk for age-related macular degeneration (AMD), a condition that destroys structures in the back of the eye necessary for vision (Arch Ophthal 11/03). But you can drop your risk of AMD by taking supplements of antioxidant vitamins and zinc, according to researchers at Johns Hopkins' Wilmer Eye Institute.

Their research shows that a dietary supplement of vitamins C, natural vitamin E and beta carotene, along with zinc, lowers the chances of progressing to advanced AMD in certain at-risk people by about 25%. Daily supplements also reduced the risk of vision loss by about 19%.

The carotenoids lutein and zeaxanthin also help protect aging eyes. When scientists compared healthy eyes with eyes suffering from AMD, they found that AMD eyes contained lower levels of these vital nutrients (Ophthalmology 2003; 109:1780). Furthermore, they found that levels of these chemicals generally decline as you grow older.

Healthy at All Ages

When it comes to designing a healthy lifestyle, general rules like these can be followed, but you should individualize your plan to fit your needs. No matter which type of exercises you pick out or what healthy foods you choose, look for a strategy and a plan you can stick to. If you think a selection of foods are good for you but you absolutely hate their taste, chances are you won't be able to stick to a diet that includes them.

The same goes for exercise: Pick out activities that you enjoy and that you can perform consistently. That increases your chance of sticking to an exercise program.

Staying healthy is enjoyable and it helps you get more out of life every day, no matter what stage of life you're in.

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Vitanet ®

(https://vitanetonline.com:443/forums/Index.cfm?CFApp=1&Message_ID=335)

Date: June 10, 2005 09:51 PM
Author: Darrell Miller (dm@vitanetonline.com)
Subject: Immunity - The Big Picture

Immunity: The Big Picture by Brian Amherst Energy Times, August 3, 1999

Your body wants to be well. Outfitted with a battalion of defenses for strategic deployment, your immune system explodes with resistant force at the first sign of infective invasion.

Think of the time a tiny splinter embedded itself in your thumb. By bedtime, the spot rose and reddened; by morning, white blood cells had launched their campaign, building a hot, throbbing fortification. By day's end, the bit of wood was propelled to the surface and ejected by the immune system warriors. Once again, a foreign assailant was summarily ousted.

The Protective Force
The immune system is a dazzlingly complex mechanism charged with guarding against infection, colds, flu and cancer. Laced with networks of couriers and transmitters, backed up by intricate fail safe devices and reinforced by memory units, immunity constantly adapts to highly specific and evolving needs.

"Supporting the immune system is critical to good health. Conversely, good health is critical to supporting the immune system." So write naturopathic doctors Michael T. Murray and Joseph E. Pizzorno in their Encyclopedia of Natural Medicine (Prima).

Maintaining the immune system requires a comprehensive program of wholesome diet, resilient attitude, fitness enhancing activity and nutrients keyed to the clear and specific needs of this energetic machine.

The all-star lineup for immune sustenance: a high-potency multiple vitamin/mineral formula, vitamins C and A, bioflavonoids, isoflavones, zinc and selenium, antioxidants like ActiVin (grape seed extract) and pycnogenol (French maritime pine bark), as well as the botanicals echinacea and astragalus.

But optimal partnering with your immune system also benefits from understanding its worKings.

The Battlefronts
The immune system wages war on the organ, tissue and cellular fronts. It encompasses the lymphatic vessels and organs (lymph nodes, thymus, spleen and tonsils), white blood cells, specialized cells in particular tissues and customized chemicals.

Lymph, a milky fluid consisting of water protein and immune cells, is the essence of the immune system. Powered by muscle movement (an important reason why exercise boosts immunity), the lymphatic system collects and transports lymph to the lymph nodes. These nodes contain certain immune cells and filter out invading antigens, as well as produce antibodies, before siphoning the lymph out into the bloodstream.

If you've ever had "swollen glands," that means your lymph nodes have been in overdrive.

Macrophages are the immune cells that filter lymph, consuming bacteria and cellular debris while protecting the lymph system from invasion and damage.

Gland Tidings
Two organs dominate immune function: n The thymus. The most influential, critical gland of the immune system, located just below the thyroid gland and above the heart; produces T lymphocytes, white blood cells responsible for cell-mediated immunity not controlled by antibodies. This immune response is tailored to specific antigens and is vital to resisting infection from mold-like bacteria including yeast, fungi, parasites and such viruses as Epstein-Barr, herpes simplex and hepatitis. It also protects against cancer, allergies and autoimmune disorders like rheumatoid arthritis. n The spleen. The largest mass (about seven ounces) of lymphatic tissue in the body, located in the upper left abdomen behind the lower ribs; it produces white blood cells, which engulf and destroy bacteria and cellular debris; recycles material from worn out red blood cells and platelets; produces immune system enhancing compounds, including the proteins tufsin and splenopentin, and spleen extracts.

The White Blood Cell Album
Although white blood cells (WBCs) are uniformly accountable for protecting the body against bacteria, viruses, fungi and parasites, the different types of WBCs vary considerably in form and function. n Neutrophils phagocytize, that is, eat, viruses, bacteria and old or dead cells. They don't need any biochemical messengers for activation and their effectiveness is wide-ranging.

In Monocytes collect cellular trash after infections and can trigger immune responses; eosinophils can eliminate foreign particles and, with basophils, are involved in immune response.

In Lymphocytes include varieties of T cells, which work with other white blood cells or attack and destroy foreign tissue, cancer cells or virus-infected cells; B cells that produce antibodies that bind to bacteria, viruses or tumors; and natural killer cells (NKCs) that destroy cancerous or virally-infected cells.

(Based on information in the Encyclopedia of Natural Medicine; The Road to Immunity: How to Survive and Thrive in a Toxic World (Pocket Books) by Kenneth Bock, MD, and Nellie Sabin; and the Johns Hopkins Family Health Book (Harper Resource).

Keep the System Sound
Your immunity mechanism calls for special care and support. The dilemma: How to develop a balanced system of complementary and alternative therapies to build and sustain powerhouse immunity? "There is no question that, in terms of immune system response, certain supplements can reduce infections, asthma, autoimmune disease and risk factors for cancer," says Samuel D. Benjamin, MD, former project director of the Arizona Center for Health and Medicine and an ardent advocate for complementary medicine.

"But you must always be sure to maintain the mind-body-spirit link," he told Energy Times. "For the mind, it could be exercise, yoga or meditation. Evidence shows improved immune system responses from these therapies. And in any case, you never read in the headlines that somebody has been admitted to the emergency room overdosing on meditation.

"Intentionality also is an important part of the mind link: believing you are going to fare well. For your spirit, you must ask yourself such questions as, Do I feel connected to others?

"For the body, a daily multivitamin and mineral supplement. Much depends on your community: I live on Long Island, where there is a high incidence of breast cancer, so I would recommend green tea and isoflavones from soy products for women."

Dr. Benjamin stresses moderation in the use of immune-intensifying supplements, among which he cites mixed carotenoids, zinc and vitamin E.

The Soy Solution
Scientists who took the cue from the apparent link between high-soy Asian diets and low cancer incidence have developed a compelling case for soy as an immune-supportive anticancer agent.

In a study conducted by the University of Southern California at Norris and published in the March 4, 1998 Journal of the National Cancer Institute, researchers reported that genistein, an active component of soy products, short-circuits the ability of tumor cells to elude destruction by the immune system due to an excess of defensive stress proteins.

Genistein seems to make cancer cells vulnerable to the immune response. Researchers at Wake Forest University told participants at the January 1999 meeting of the American Association for the Advancement of Science that dietary or supplemental soy fed to monkeys counteracted cell proliferation that is a cancer precursor.

That Championship C
Probably the most widely recognized immune accelerator is vitamin C, an honored warrior against scurvy and, in 1970, again celebrated by Linus Pauling for its preventive powers over the common cold.

Immune cells are known to accumulate and retain high levels of vitamin C. Researchers at Memorial Sloan-Kettering Cancer Center in New York now understand how that happens: Proteins called growth factors (which control growth and production of immune cells) also increase those cells' ability to take up vitamin C.

These researchers, reporting in the April 1998 issue of the journal Blood, explain that the additional glucose that the growth factors pump into immune cells (for enhanced energy), plus extra vitamin C, intensify immune response.

And folks with higher levels of vitamin C in their blood serum experience less cell damage from free radicals that leads to cancer, heart and pulmonary disease and other chronic conditions.

Scientists at the University of Buffalo (addressing the June 13, 1997 meeting of the Society for Epidemiologic Research) deduced from studying population groups that high levels of vitamin C are associated with low oxidative stress and lower risk of cell damage.

From A to Zinc
In Kids with neuroblastoma, a malignant tumor of embryonic nerve cells and the third most common form of childhood cancer, experienced significantly improved survival rates when their therapy included high doses of retinoic acid, a derivative of vitamin A, according to researchers at the University of California, San Francisco, and Childrens Hospital Los Angeles, who reported to the American Society for Clinical Oncology on May 18, 1998.

In Colostrum, the pre-milk liquid produced by mammals during the first 24 to 48 hours after birth, took the spotlight recently as a supplement imbued with multiple immune factors and natural antibiotics that augment body's immune response. A 1992 study showed that bovine colostrum might be able to reduce and prevente infections in immune deficient folks, especially those with AIDS.

In University of Pittsburgh Cancer Institute researchers found for the first time (on laboratory animals) that vitamin D appreciably inhibits widespread prostate cancer by binding to cancer cells and triggering cell death or their transformation to benign cells.

In Vitamin E exerts formidable immune-enhancing influence on both antibody and cell-mediated immunity. One fundamental study in the Journal of the American Medical Association (245, 1981: 53-58) established conclusively that vitamin E deficiency results in significant impairment of immune function. Later studies demonstrated that it reduces prostate cancer by up to one-third.

In Coenzyme A, described as a metabolic enzyme, takes part in starting numerous body processes that provide energy for the immune system. If you ever run short of this enzyme, fat processing within your body would grind to a halt.

in Researchers looking at a substance with the tongue twisting name 3-acetyl-7-oxo-Dehydroepiandro-sterone, believe it aids immunity by quelling stress hormones.

in Mushrooms contain natural substances called polysaccharides, believed to enhance immunity. In particular, maitake mushroom, which conveys the immune booster beta-D-glucans, is reputed to help fight infections and drop blood pressure.

in Men and women taking selenium supplements for 10 years had 41% less total cancer than those taking a dummy, according to a January 1997 study by Cornell University and the University of Arizona. Other studies have shown it to reduce the risk for colon cancer by about 60%. n Zinc may provide immediate protection against the all too common cold. Scientists at the University of Florida were the first to apply genetic fingerprinting methods like those used in criminal and paternity investigations to understand how nutrients directly affect human immune cells.

The study, in the April 1998 Journal of Nutrition, demonstrates that zinc signals cells to make the protein metallothionein, which protects against infections, toxins and other stressors.

Phytochemicals a la Carte
Researchers extol the powers of phytochemicals in fruits and vegetables available in dietary or supplement form as immune-igniting antioxidants. These compounds neutralize free radicals that oxidize cellular membranes, rendering them vulnerable to cancer.The Strang Cancer Prevention Center, an affiliate of New York Presbyterian Hospital, offers a menu of the top antioxidant phytochemicals. The center's director, Mitchell L. Gaynor, MD, is coauthor (with Jerry Hickey, RPh) of Dr. Gaynor's Cancer Prevention Program (Kensington): n Carotenoids, including beta-carotene from veggies and lycopene (the substance that lends the tomato is ruddy complexion), fight free radicals.

n Isoflavones from soy, fight angiogenesis, the process by which new blood vessels form to supply nutrients to cancerous growths. n Sulforaphane in broccoli, kale and cabbage activates anticancer enzymes.

n Omega-3 fatty acids in cold water fish block the synthesis of prostaglandins, natural compounds in the body that promote tumor growth.

n Ginger contains antioxidant compounds, each more potent than vitamin E. Recent studies on mice show ginger can prevent skin tumors. n Rosemary contains carnosol which deactivates carcinogens and helps limit the effects of prostaglandins.

Sometimes the world can look like a dangerous place, especially when you're sick and tired much of the time. But in the search for immunity, menus of health help like this ensure that no matter what your immunity needs, a boost can be yours with the proper nutrient selection.

--
Vitanet ®

(https://vitanetonline.com:443/forums/Index.cfm?CFApp=1&Message_ID=282)

Date: June 09, 2005 09:48 AM
Author: Darrell Miller (dm@vitanetonline.com)
Subject: AMINO ACIDS AND PROTEIN

Amino Acids

AMINO ACIDS AND PROTEIN

Next to water, protein is the most abundant substance in the human body. Complex mega-molecules of protein are the structural building blocks of tissue. The thousands of different proteins in our bodies are composed of 20 molecules called amino acids. In the last 20 years, research has shown the benefits of amino acid supplementation to such diverse areas of human biochemistry as metabolism, enzyme and neurotransmitter production and antioxidant protection. Source Naturals utilizes the latest-breaking research to bring you a highly comprehensive line of amino acid supplements.

Amino Acids

DNA provides the instruction manual for life, RNA reads the manual and the genetic information is expressed by proteins. Proteins are the most abundant macromolecules in living cells constituting 50% or more of their dry weight. They create the structure of our cells and tissues, and play an essential role in virtually all of the biochemical events that animate those tissues.

The term "protein" refers to a set of macromolecules that encompasses an extensive variety of structure and function&endash;from helical rods with the tensile strength of steel to elastic sheets to huge molecular machines with hinged jaws that snap closed to hold other molecules in place. Amazingly, all proteins, in their remarkable variety, are built out of a set of 20 simple molecules called amino acids.

Amino acids are one of the four types of small molecules out of which all life is constructed. The other three are: palmitic acid (see "Essential Fatty Acids," page #), adenine and glucose. All amino acids share a common chemical "backbone" which consists of an a -carbon atom to which four substituent groups are bonded: a nitrogen-containing amino group (H2N), a carboxyl group (COOH), a hydrogen atom and an "R" group. The "R" group or side chain (figure #) varies in electric charge, size, structure and solubility in water, giving each amino acid its distinct chemical properties. Since all amino acids (except glycine) contain at least one asymmetrical carbon atom, each one exists in at least two forms: the l form and its mirror image or stereoisomer, the d form. While both forms are found in biological systems, only the l form is present in proteins.

Amino acids are linked together like beads on a string to form proteins, sometimes called peptides because of the peptide bonds that link the amino acids together. They range in size from simple two-amino-acid dipeptides to polypeptides which contain more than 1800 connected amino acids. The chemical backbone of the amino acids and their sequence constitutes the primary structure of a protein. Polypeptide chains then fold into specific 2 and 3-dimensional configurations that are unique for each type of protein. The pattern of folds, along with the chemical nature of the amino acid side chains contained in it, give a protein its characteristic biological activity. For example, the connective tissue proteins collagen and elastin give structure to cellular organelles and tissues, while proteins called enzymes catalyze and facilitate metabolic chemical reactions.

Nine of the 20 amino acids involved in protein synthesis are considered "essential";they cannot be synthesized by the body and must be obtained from food sources. The term "non-essential" is sometimes used to classify the other eleven amino acids. However, this word is perhaps a misnomer; a better term might be synthesizable. These amino acids are just as vital to human metabolism as the "essential" amino acids; so vital that the body can synthesize them. They are, however, more available, more versatile, and more interchangeable.

When the presence or absence of a particular amino acid will determine whether a protein can be created or not, that amino acid is called a rate-limiting factor for that protein. For example, the tripeptide glutathione, a compound that forms an important part of the body's protective mechanisms, is made of the amino acids glutamic acid, glycine and cysteine. Glutamic acid and glycine tend to be plentiful in the diet, and can be easily interconverted. Cysteine is the rate-limiting factor for glutathione; the amount of cysteine in the diet will determine the amount of glutathione that can be manufactured by the body.

Amino acids have a special role to play in brain nutrition, because all neurotransmitters are derived from amino acids or related compounds such as choline. Brain neurotransmitters, specifically, are biochemical keys to the worKings of the mind. They are substances that perform chemical transmission of nerve impulses between neurons or between neurons and other cell types such as muscle. They work in the following way: an electric current (or action potential) travels down the length of a neuron, or nerve cell, until it reaches the synapse - a narrow gap between two cells. The incoming nerve impulse triggers the release of neurotransmitter (NT) molecules, which diffuse across the synaptic gap. The neurotransmitter molecules bind with receptor proteins embedded in the membrane of the post synaptic neuron and activate a physiological response. Excitatory neurotransmitters propagate a new action potential while inhibitory NT's inhibit the development of new action potentials.

The amino acid precursors of neurotransmitters are able to cross the blood-brain barrier, a structural feature of brain anatomy that prevents many substances from contacting brain tissue. Thus, it is possible to influence brain metabolism (and therefore emotional states) through the mechanism of neurotransmitter synthesis. The enhancement of neurotransmitter production is one of the most exciting advancements to occur in the field of nutrition in modern times.

A major portion of the amino acid requirement in humans is derived from the proteins in food. Successive proteolytic enzymes attack the peptide bonds, cleaving one amino acid at a time from the polypeptide chain. Ultimately, free amino acids as well as small peptides (especially dipeptides) are absorbed through the mucosal cells of the small intestine. The small peptides are then further hydrolyzed so that only free amino acids enter the liver and portal vein. This sounds like a fairly straightforward process. However, the presence of a particular amino acid profile in a certain food does not guarantee the assimilation of those amino acids when the food is ingested. There are three types of amino acids: acidic, basic and neutral; each of these classes has a different transport mediator. Therefore, there is competition for the carrier between any two amino acids in a certain class, both in the digestive tract and at the blood-brain barrier. Thus, the isolation of "free-form" amino acids is an important aid to nutritional engineering. In many cases, the consumption of high potencies of a particular amino acid allows that nutrient to overwhelm the competition for absorption. The resulting increase in blood and tissue levels will yield the benefits conferred by that nutrient.

The isolation of free-form amino acids is an important advancement in the field of nutrition science. Amino acid supplements offer a broad range of choices to complement your nutritional program.

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VitaNet ®
VitaNEt ® Staff

(https://vitanetonline.com:443/forums/Index.cfm?CFApp=1&Message_ID=253)

Date: June 02, 2005 12:18 PM
Author: Darrell Miller (dm@vitanetonline.com)
Subject: Higher Mind - Smart Nutrients for the Performance of a Lifetime...

Our adult years are the time to reap the fruit of an active, meaningful life – appreciated by family and friends who value our experience and knowledge. For some, however, their later years are clouded by a mental decline that erodes their capacity to enjoy life. More of us are becoming apprehensive about the future health of our minds. Will we still be able to communicate our needs as well as our wisdom? As science focuses its investigative might on the worKings of the human brain, new findings suggest that it is possible to enjoy a vital, healthy brain and mind – well into old age. Based on compelling research, Source Naturals formulated HIGHER MIND. It contains the most important Neuroceuticals™ now recognized by nutrition scientists – including phosphatidyl serine, a natural nutrient that promotes cognitive function. The connection is clear: nourish your brain; enrich your life.

To have a healthy, well-functioning brain and nervous system, we need the correct nutrients. Our diets must provide the necessary raw materials for nerve cells to grow, for the synthesis of neurochemicals, and for the maintenance of nerve cell membranes. Nutritional deficiencies can alter the brain’s metabolism, which is expressed by changes in perception and thinking, behavior and mood.

Brain Cells – Issued at Birth

Before birth, neurons (nerve cells) are created at the amazing rate of 15 million per hour. As infants, we have over 100 billion neurons, but this is the most we will ever have because – unlike most other cells in our body – nerve cells do not reproduce. A different strategy is used to replace the neurons that are naturally lost throughout life: nerve cells repair themselves and grow by extending branches of nerve fibers called dendrites (from the Latin word for tree). These are the communication links with other neurons that form the circuitry of the brain. A single neuron may be in contact with up to a hundred thousand others! When the density of this fragile organic communication network decreases, we experience a corresponding decline in mental acuity.

Brain Cell Membranes

The membrane is the working surface of a cell. It needs to be strong yet flexible, so the cell can maintain its integrity and be able to move and change shape. The membrane regulates the flow of nutrients into the cell and the removal of waste, plus controls the passage of molecular messages from outside the cell to its interior. Membrane ion pumps use a third of the cell’s energy just to maintain the correct ratio of sodium to potassium. In neurons, a rapid exchange of sodium and potassium ions across the nerve membrane is responsible for their unique ability to generate the electrical impulses that are the basis of all communication in the nervous system. As cells age, their membranes become less fluid and more rigid. Key membrane molecules called phospholipids are crucial to the health of neuron membranes, allowing the brain to maintain its youthful quality. The phospholipids in HIGHER MIND – especially phosphatidyl serine and phosphatidyl choline – are essential nutritional supplements for the aging brain.

Phosphatidyl Serine – Key to Cognition

For the past decade, researchers have been investigating the role in brain health of a remarkable neuroceutical, phosphatidyl serine (PS). This key structural molecule is integral to the matrix of fats and proteins that compose cell membranes. Although PS is found in all the cells of the body, its highest concentration is in nerve cell membranes. PS is rarely found in the foods we eat, so the body has to synthesize it, but the process is energy- intensive and becomes less efficient with age. Consequently, our levels of PS tend to decline as we get older. PS taken as a dietary supplement is well-absorbed, readily reaching the brain, where it helps create more effective, well-structured nerve cell membranes. The positive effects of PS supplementation have been demonstrated by 23 clinical studies with over 1200 human subjects, ages 43 to 90. Consistent and statistically significant results have confirmed the value of PS in improving age-related cognitive decline, as well as in improving behavioral aspects such as apathy and withdrawal.1 A major study concluded that for one particular measurable parameter of higher mental functions, PS recipients achieved scores of persons roughly 12 years younger.2 Nerve Growth Factor (NGF) is one of the most important proteins the body makes. It enables neurons to extend dendrites out to other neurons, allowing the brain to maintain an effective communication network. In experiments, PS enhanced the production and reception of NGF, which tend to drop off radically with age.3 The effects of PS at the cellular level are manifest in the performance of the brain as a whole. Subjects taking PS showed increased levels of brain energy metabolism. This enhancement corresponded to higher performances on cognitive tests.4

The Chemistry of Thought

Science now understands the role of neurotransmitters in regulating the body’s complex network of behavior. Neurotransmitters are the chemicals used by neurons to communicate with each other. Activated by a neuron’s electrical impulse, neurotransmitters travel between nerve cells, where they excite or inhibit (in various degrees) the electrical impulse in neighboring cells. One of HIGHER MIND’S key strategies is to improve the brain’s ability to produce and use acetylcholine, a key excitatory neurotransmitter. Acetylcholine is essential for both the storage and recall of memory, and partly responsible for concentration and focus. It also plays a significant role in muscular coordination. Patients showing cognitive decline may exhibit reduced ability to synthesize and utilize acetylcholine.5 The chemical building blocks of acetylcholine and other neurotransmitters are called precursors. The most important one for acetylcholine is DMAE (dimethylaminoethanol). This natural substance is found in various fish, such as anchovies and sardines. Supplements of DMAE (and phosphatidyl choline) promote increased levels of choline in the brain. Acetylcholine is created when an acetyl group is attached to the choline molecule, with the help of choline acetyl transferase (CAT), a key brain enzyme. Acetyl L-carnitine is an amino acid that activates this enzyme. Acetyl L-carnitine may also help reduce lipofuscin deposits in the brain because of its involvement in the metabolism of fatty acids.6 Lipofuscin is composed of oxidized fats and proteins; the brown “age spots” on the back of an elderly person’s hand are made of lipofuscin. The amino acid L-pyroglutamic acid sensitizes the acetylcholine receptor sites on a neuron membrane. A given amount of acetylcholine will then have a larger, more powerful effect. Studies have shown that supplements of L-pyroglutamic acid seem to enhance the ability to focus, remember, and learn.

Total Nutrition for the Brain

The neurotransmitters dopamine and noradrenalin are critical to motor coordination, motivation, concentration, and alertness. Like acetylcholine, their production tends to decline with age. The precursors and activators of dopamine and noradrenalin included in HIGHER MIND are the amino acids N-Acetyl L-Tyrosine and DL-phenylalanine (DLPA), plus folic acid, vitamins B-3, B-6, and C. DLPA is also a precursor to PEA, a neuroamine that has a stimulating effect on the brain. Glutamine is an amino acid precursor to glutamic acid, a major excitatory neurotransmitter involved in mental activity and learning. Glutamine acts as an alternative fuel source for the brain when blood sugar levels are low. It also helps the brain dispose of waste ammonia, which is a natural result of protein breakdown but is irritating to neurons even at low levels. GABA is a dietary amino acid which is also an inhibitory neurotransmitter. GABA works to calm and balance the mind, enhancing mental focus. Along with taurine, these two relaxing neurotransmitters provide a balancing influence to the other, excitatory neurotransmitters. Taurine is found in brain tissue more than anywhere else in the body. It has antioxidant properties and serves as a nerve cell membrane stabilizer, preventing excessive or erratic electrical activity in the brain.

The Importance of Magnesium

Magnesium must be present in adequate amounts in the synaptic gaps between neurons or the neurons become hyper-reactive: causing noises to sound excessively loud and emotional reactions to be extreme. Magnesium also activates a key enzyme responsible for maintaining cellular sodium- potassium balance, which is absolutely essential to the electrical activity of nerve cells, as well as to the existence of the cell itself. (Cells would burst if the sodium-potassium ratio were wrong.) Magnesium also helps relax cerebral blood vessels and is important to the manufacture of ATP, the chief energy molecule of the brain. A buildup of aluminum has been found in the brains of some elderly. In 1989, the British medical journal Lancet published a study showing that drinking water with aluminum can increase the risk of damage by up to 50%. An abundant natural element, aluminum is now a common feature in our culture. It’s found in tap water, cookware, deodorants, beverage containers, baked goods, and of course as aluminum foil. In the brain, aluminum breaks down the structure of neurons – causing them to starve – by displacing magnesium from tubulin, a glycoprotein responsible for making microtubules. These tiny pipe-like structures within a neuron provide needed rigidity, as well as transport nutrients from the nucleus down the dendrites to the ends of the nerve cell. Magnesium malate is an excellent form of magnesium that ensures neurons receive this vital mineral.

B is for Brain Vitamins

HIGHER MIND also contains a high profile of B vitamins and other key nutrients that are often N A T U R A L S S O U R C E Strategies for Wellness SM ¤ lacking in older individuals. A deficiency in any of the B vitamins can alter nerve function and psychological well-being. Thiamine (B-1), known as the “nerve vitamin,” was first recognized because its deficiency caused beriberi, a degenerative nerve disease. Thiamine is part of the structure of nerve cell membranes and is important to the reparative process that neurons need to offset the stress of continual firing of the electrical impulse. Low amounts of thiamine can cause cell malnutrition in the hypothalamus, the brain’s memory center. 7 NAD and NADH, two coenzyme forms of Niacin (B-3), are the most plentiful coenzymes in the brain. They are essential to hundreds of enzymatic reactions, including ones that produce energy. NADH can stimulate the synthesis of key mood-elevating neurotransmitters. It is also one of the body’s most potent antioxidants. Pantothenic acid (B-5), cyanocobalamin (B-12), and folic acid are required to form the myelin sheath – the insulating covering of nerve fibers. A diet low in pantothenic acid has been shown to make test subjects emotionally upset, irritable, and depressed.7 A lack of B-12 can result in poor concentration and, in severe deficiencies, hallucinations. Pyridoxine (B-6) is precursor to over 60 enzymatic reactions and is involved in the synthesis of several neurotransmitters.

Brain Power

Brain cells almost exclusively burn glucose for their energy (other cells can also burn fat), and typically require 50% of all the glucose in the blood. Two B-like vitamins help in the utilization of glucose: PAK (pyridoxine alpha-ketoglutarate) may potentiate the effects of insulin and improve glucose utilization to the cells;8 Biotin is important for the transformation of glucose into energy in the brain. Lipoic acid and coenzyme Q10 are metabolic energizers that help produce ATP, the primary energy molecule in the body. Since the brain uses 20% of the body’s total energy supply, efficient ATP production is vital. Lipoic acid and CoQ10 are also powerful antioxidants that help regenerate other antioxidants in the body. The blood vessels feeding the brain become less efficient as we pass middle age. Since the brain depends on the bloodstream to deliver nutrients and oxygen and to remove waste, the quality of this blood flow is paramount to proper brain nutrition. Ginkgo biloba leaf extract has been shown in scientific studies to increase blood flow to the brain by helping vessels to dilate. It also promotes the smoothness and healthy integrity of blood vessel linings.

For the Life of Your Mind Without proper nutrition, the brain will deteriorate; therefore strategies are needed to both enhance current brain function and protect it throughout life. Based on the latest scientific findings, Source Naturals HIGHER MIND is formulated with neuroceuticals that support the mental functions that tend to decline with age. They give your brain the nourishment it needs to integrate perception, memory, and learning into a more comprehensive awareness – so you can excel for a lifetime.

References
1. Palmieri, G., et al. (1987). Clin. Trials J. 24: 73- 83.
2. Crook, T.H., et al. (1991). Neurol. 41: 644-49.
3. Nunzi, M.G., et al. In Phospholipids: Biochemical, Pharmaceutical and Analytical Considerations (ed. I. Hanin and G. Pepeu).
New York: Plenum Press, 1990.
4. Heiss, W.D., et al. (1993). Annals N.Y. Acad. Sci. 695: 327-31.
5. Passeri, M., et al. (1990). Int. J. Clin. Pharm. Res. X(1/2): 75-79.
6. Kohjimoto, Y., et al. (1988). Japanese Journal of Pharmacology 48(3): 365-71.
7. Philpott, William H. Brain Allergies: the Psychonutrient Connection. New Canaan: Keats, 1987.
8. Passariello, N., et al. (1983). Int. J. Clin. Pharmacol. Ther. Toxicol. 21: 252-56.

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