A highly concentrated, effective extract of milk thistle. Supplies a Standardized 30:1 Extract Yielding 80% total flavonoids. Boosts Immune Response in Clinical Trials. Demonstrates Liver-Protecting Benefits in Human Studies. Possesses Antioxidant and Free Radical Scavenging Activity. Improves Glutathione Levels, the Body’s Major Antioxidant. Stimulates Liver Protein Synthesis and Liver Cell Regeneration. Jarrow Formulas Milk Thistle (Silybum marianum) 30:1 extract is standardized to contain 80% total Milk Thistle seed flavonoids, including the important Silymarin fractions isosilybinins A and B, silybinins A and B, silychristin and silydianin. This particular group of flavonoids, collectively known as Silymarin, supports liver function by raising protective glutathione levels.