Milk thistle, also known as Silybum marianum, is an annual or biennial plant that grows to a height of 12 to 79 inches, depending on region and variety. This wide-ranging thistle plant typically has red to purple flowers and shiny pale green leaves with white veins. Originally it was native to Southern Europe and parts of Asia, but today has spread throughout the world. Medicinal history Milk thistle has a long recorded medicinal history across Mediterranean and Near Eastern cultures. Ancient Greece and Rome: In the 1st century AD, Pedanius Dioscorides, a Greek physician serving in the Roman army, listed a plant called "silybum" in his in his medical text De materia medica. Medicinal uses included liver support and easing milk flow in nursing women. Later, Galen, another Greek physician and philosopher, provided more documentation—including preparations for various digestive issues. Early Christian/Byzantine era: Medieval Greek and Arabic medical writers preserved and expanded the original documentation in De materia medica. Milk thistle also appears in other Byzantine and Arabic pharmacopoeias. Middle Ages/Renaissance: Milk thistle was used as a traditional European herbal medicine, with many listings in apothecary treatments during the 12th–16th century. Many of these remedies continue to be used in parts of Europe to this day. Traditional Middle Eastern medicine: Both Unani (Perso-Arabic traditional medicine) and Islamic physicians used milk thistle preparations for hepatic conditions, poisons, and as a general restorative. Modern era Notwithstanding the standard anti-herbal label applied by Wikipedia to any traditional medicine, the modern research on milk thistle is objectively positive and piles up by the year. For any inquisitive researcher who chooses to ignore Wikipedia's "no clinical evidence" wording—wording applied to virtually any ingredient that is not a pharmaceutical drug—literally hundreds of studies are available for review on government databases such as PubMed.gov. These studies overwhelmingly support milk thistle for supporting the human body in three primary areas: Hepatoprotection - Supporting the liver against toxins and inflammation. Antioxidant - Increases glutathione levels, which is the body’s master antioxidant. Metabolic Health - Though research here is more limited, documentation is mounting that milk thistle helps with insulin sensitivity and blood sugar management. Extract efficiency Understanding the modern use of milk thistle, compared to the ancient and traditional uses, requires making a distinction between "whole" milk thistle and the concentrated extracts of the active compounds. This is typically seen on a supplement label as "Silybum marianum 80% Extract." The distinction is primarily a matter of concentration and accessibility. Whole milk thistle refers to the raw, ground seeds of the Silybum marianum plant, which naturally contain only about 1.5% to 3% of the active therapeutic compounds. In ancient/traditional uses, large quantities of milk thistle--often mixed with other foods--had to be consumed in order to receive a medicinal benefit. In contrast, the "80% extract" is the "active team" of nutrients that have been purified and standardized to ensure it makes up 80% of the supplement. Because the active compounds in milk thistle are tucked inside a very tough, fibrous seed, and do not dissolve easily in water, the human digestive system is remarkably poor at absorbing them from raw powder. So, extracting and purifying to 80% provides a path to significant health benefits without the consumption of large quantities of whole powder. When you see "80% extract" on a label, you are most likely looking at a standardized extract-grouping of six primary flavonolignans and one flavonoid: Silybin A, Silybin B, Isosilybin A, Isosilybin B, Silychristin, Silydianin, and Taxifolin (the flavonoid). Final word The data is consistent: Milk thistle is a world-class "Safety Net" for the liver and kidneys in a modern, toxic world. This is especially true for those dealing with a high-sugar, junk-food diet. Milk thistle lowers inflammation and protects the body's built-in filters. When utilizing milk thistle, the health consumer should recognize that "whole" milk thistle is a gentle, broad-spectrum herb suited for general dietary inclusion. However, the 80% extract is the real "surgical tool" required for targeted health goals. The extract provides the high-potency dose of the active ingredients—designed to survive digestion and effectively support the liver and kidneys against modern dietary and environmental stress. Coming soon: In out next post, we'll cover three studies—from just the past year alone—that corroborate milk thistle's usefulness in supporting the liver and kidneys. - - - Sources: American Botanical Council, ClevelandClinic.org, MayoClinic.org, PubMed.gov,   JustAPedia.org (Silybum marianum).
