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  When designing supplements to provide the 
foundation of a complete nutritional program, Source Naturals
devoted extensive research to making sure you get the most out
of the nutrients you consume. We took into account a key factor
other such products have overlooked: the fact that our bodies
are challenged by living in the modern world. We are
constantly exposed to stresses our evolutionary ancestors never
faced: a daily barrage of pollutants in our air, our water, even
our food supply. In recognition of this fact, Source Naturals
has created products that not only supply essential nutrients,
but also support our key organ of detoxification: the
liver. Click here to for Multiple Supplements products ---------------------------------------------------
----------------------------- Why Take A Multiple? The
advantage of taking a high-quality multiple, rather than taking
individual nutrients, is that nutrients often enhance the
absorption and/or function of other nutrients. In other words,
nutrients work together. The list of nutrient interactions in
the body is seemingly endless. For example, vitamin C
dramatically enhances the absorption of iron. Vitamin D enhances
calcium absorption and reduces excretion of calcium by the
kidneys. Magnesium and calcium have complementary actions, with
both playing a role in neuromuscular transmission and activity
as well as bone metabolism. Vitamin B-5 is crucial in
metabolizing amino acids and plays a role in converting the
amino acid tyrosine into the neurotransmitters epinephrine,
norepinephrine and dopamine. And the list goes on. Many
antioxidant nutrients in the body have synergistic relationships
as well. For example, the amino acid N-acetyl cysteine and
vitamin B-2 work together. N-acetyl cysteine is an acetylated
amino acid that is an antioxidant in its own right and also a
precursor to another potent antioxidant, glutathione.
Glutathione is a key player in redox reactions in the body?a
repeating loop of chemical reactions in which glutathione is
shuttled back and forth between its oxidized and reduced states.
In its reduced form (GSH), glutathione is a potent antioxidant.
After scavenging free radicals, glutathione becomes oxidized
(GSSG). But, by using a coenzyme form of vitamin B-2 called
flavin adenine dinucleotide (FAD), the body can convert
glutathione back into its reduced state so it can continue to
scavenge free radicals. In a similar fashion,
alpha-lipoic acid recycles the antioxidant vitamins C and E. And
the mineral selenium performs similar functions in the body as
vitamin E, as well as regenerating oxidized vitamin E.