silymarin

noun

sil·​y·​mar·​in ˌsil-i-ˈmar-ən 

: an antioxidant flavonoid C₂₅H₂₂O₁₀ consisting of a mixture of three isomers isolated from seeds of the milk thistle, held to have properties protecting the liver from or clearing it of toxins, and used in dietary supplements and herbal remedies