Seroyal Genestra's Milk Thistle Tincture is a herbal supplement that helps with liver functioning. The milk thistle extract used in this formula has proven powerful in helping to detoxify. regenerate and tone the liver. guarding against harmful inflammation. Milk Thistle Tincture is an ideal supplement for use by those undergoing chemotherapy or who have been diagnosed with cirrhosis. allergies. hepatitis or fatty degeneration of the liver.