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MILK
THISTLE
…supports
liver function*
Features
& Benefits
-
Scavenges
free radicals*
-
Stimulates
liver cell synthesis*
-
Interferes
with the production of leukotrienes*
-
Prevents
damaging toxins from entering liver cells*
Facts
about Milk Thistle
Milk
Thistle (Silybum marianum)
herb, also commonly known as Marian Thistle, Mary Thistle, and
Lady's Thistle, is a member of the Asteacea family and can
be found growing in many regions of the United States, and southern
Europe.1
Various
parts of the milk thistle plant have been used for thousands of years: as
a garnish (added to salads and vegetable dishes); and as a health food,
primarily for liver health.* 1
Historically, milk thistle was used for relieving congestion of the
liver, kidneys, and spleen, and by pregnant and lactating women to
stimulate the production of milk.* 1
Currently,
standardized milk thistle seed extract is used to maintain and regain
liver health, especially those who consume excessive alcohol according to
most,*1,2,3,4,5, 6 though
not all, 7,8 scientific research.
This use was validated by studies using between 200 mg and 420 mg of silymarin per day (usually in three separate doses).
A
large body of research has resulted from scientists' curiosity regarding
milk thistle's historically reputed clinical actions and benefits. About
twenty years ago, German scientists began looking at the chemical
properties of the milk thistle fruit and isolated the water-soluble
flavonoid complex now known as silymarin,
thought to be milk thistle's active constituent. 1,2,3,9 This
silymarin complex is primarily composed of silibinin,
silydianin, and silychristin.2
Silibinin is the most dynamic constituent of silymarin and is
thought responsible for the majority of silymarin's beneficial actions on
the liver.*6
Silymarin
helps protect against the destruction of liver cells and supports liver
function in several ways.* Silymarin enhances liver function by acting as
a potent antioxidant and helping maintain protective levels of the
important antioxidant system such as glutathione, perodoxine and super
oxide dismutase4,12 thereby guarding the liver from free-radical damage.* Studies
conducted on heavy alcohol drinkers confirm that this flavonoid complex
works as a free-radical scavenger and as a direct antioxidant to protect
liver cells.*4,9,10
Silymarin
also supports the synthesis of ribosomal protein in the liver which can
stimulate the production of new liver cells.* 1,2,9
Additionally, in amounts of 210-630 mg
per day, taken in separate doses, silymarin protects against the
formation of harmful leukotrienes which are associated with itchy, flaky
skin resulting from poor liver function and gallblader function.*
9,15
Silymarin
binds to liver cell membranes, thereby preventing damaging toxins from
reaching and adversely affecting the interior of the liver cells.*2
Silymarin works to stabilize cell membranes as well as increases
glutathione antioxidant levels, thereby protecting the interior portion of
cells from oxidative damage.* 16
Safety
Standardized
milk thistle seed extract is generally free from adverse side effects when
taken at the recommended levels of 175 mg, two to three times per day
(providing between 280-420 mg silymarin).1,2,9 Because
it supports bile secretion and flow, some people experience a mild
laxative effect when supplementing with this herb.9
Although this side effect usually disappears within a few days,
adjustments in intake can be made to counteract this action.9
Based on published reasearch, standardized milk thistle does not have
contraindications for pregnant or lactating women15
Ingredient
Highlights
Milk
thistle seed extract is made by extracting silymarin from the seeds of the
dried milk thistle plant. In agreement with current research, Nature's
Life Milk Thistle Seed Extract capsules provide 175 mg of milk thistle
seed extract standardized to 80% (or 140 mg) silymarin.
References
-
Tyler
VE. The Honest Herbal-A sensible Guide to the use of Herbs and
Related Remedies, 3rd ed. 1993, Pharmaceutical Products Press,
Hawthorn Press: Binghampton, NY, pp.209-10.
-
Milk Thistle
Fruit, Commission Emonographs, March 13 1986:169-70
-
Vogel G. A
peculiarity among the flavonoids-silymarin, a compound active on the
liver. Proceedings of the international Bioflavonoid Symposium,
Munich. 1981
-
Lang I, et
al. Effect of the natural bioflavonoid antioxidant silymarin, on
superoxide dismutase (SOD) activity and expression in vitro, Biotechnol Ther 1993;4;263-70
-
Ferenci P.
Dragosics B, Dittrich H, et al. Randomized controlled trial of
silymarin treatment in patientswith cirrhosis of the liver.
J Hepatol 1989:9(1):105-13.
-
Vellussi M,
Cernogoi AM, De Monte A, et al. Long-term (12 month) treatment with
an antioxidant drug (silymarin) is effective on hyperinssulinemia,
exogenous insulin needmalondialdehyde in cirrhotic diabetic patients.
J Heptol 1997;26:871-9.
-
Pares A,
Planas R. Torres M, et al. Effects of sylimarin in alcoholic
patients with cirrhosis of the liver: results of a controlled,
double-blind, randomized and multicenter trial. J Hepatol 1998;28:615-21.
-
Bunout
D, Hirsch S, Petermann M, et al. Controlled study of the effect of
silymarin on alcoholic liver disease. Rev Med Chil 1992;120:1370-5
-
Milk Thistle
(Silybum Marianum). AIBR
Scientific Reviews, Botanical Medical Series, 1987.
-
Dehmlow C,
Erhard J, de Groot H, et al. Inhibition of Kupffer cell functions as
an explanation for the hepatoprotective properties of silibin. Hepetology
1996;23(4):749-54
-
Altorjay I,
Dalmi L, Sari B, et al. The effect of silibinin (Legalon) on the
free radical scavenger mechanisms of human erythrocytes in vitro. Acta
Physical Hung 1992;80:375-80.
-
Muzes G, et
al. Effect of the bioflavonoid silymarin in the in vitro activity and expression of superoxide dismutase (SOD)
enzyme. Acta Physical Hung
1991; 78:3-9.
-
Feher J Lanf
I. Nekam K, et al. Effect of the silibinin on the activity and
expression of superoxide dismutase in the lymphocytes from patients
with chronic alcoholic liver disease. Free
Rad Res Commun 1987:3(6):373-77.
-
Muzes G.
deak G, Lang I, et al. Effect of silimarin
(Legalon) therapy on the antioxidant defense mechanism and
lipid peroxidation in alcoholic liver disease. Orv
Hetil 1990;131(16);863-6.
-
Reyes H. The
spectrum of liver and gastrointestinal disease seen in cholestasis
of pregnancy. Gastroent Clin N Am 1992;21:905-21
-
Shear NH,
Malkiewicz IM, Klein D, et al. Acetaminophen-induced toxicity to
human epidermoid cell line A431 and hepatoblastoma cell line Hep G2,
in vitro, is diminished by silymarin. Skin
Pharmacol 1995;8(6):279-91
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