Supports Liver Function. TRU-ID Certified Authentic. Non GMO Project Verified. 80 % Silymarin. Gluten Free. Bottles made from 97% Post-Consumer Recycled Plastic. Vegan. Bottled & tested in the USA. Milk Thistle has been used for over 2,000 years. There’s a specific substance in Milk Thistle (silymarin) that has been shown to support liver function. Nature’s Way Milk Thistle is standardized to ensure consistent levels of silymarin.