Dietary Supplement. Standardized silymarin extract 30:1. Protects liver function. 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. No wheat, no gluten, no soybeans, no dairy, no egg, no fish/shellfish, no peanuts/tree nuts. (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.)