Jarrow formulas milk thistle (Silybum marianum) 30:1 concentrate 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. Jarrow formulas milk thistle provides compounds that support the body's antioxidant system, including immune response & liver protein synthesis. , , The formula supplies a 30:1 extract to contain 80% of total milk thistle seed flavonoids. This group of milk thistle seed flavonoids, collectively known as silymarin, support liver function, and glutathione levels. Glutathione is the body's major antioxidant. Take one to three veggie capsules per day, or as directed by your qualified healthcare professional. This formula is suitable for vegans and vegetarians. Superior nutrition & formulation - The goal of Jarrow Formulas is to promote optimal health with high-quality, effective, affordable, and superior formulation of dietary supplements. Our customers can be assured of purity, value, and potency.