Milk Thistle has many beneficial effects on the human body. Their are plenty of studies out there to prove it. There are better things to take for liver protection but to rule out milk thistle as a waste is wrong. It would be a great addition with an oral but you should be taking at least a couple weeks prior to help remove any toxins that are already built up. Milk thistle (Silymarin) has been shown to have anti-fibrogenic activity along with its ability to help with liver cell regeneration (R).
A combination of Milk thistle (Silybin) and phosphatidylcholine treatment showed a significant improvement in liver enzymes, insulin resistance, and liver tissue in patients with Non-Alcoholic Fatty Liver Disease (NAFLD) (R).