Journal · Herb profile
Milk Thistle (Silymarin): A Review of Clinical Evidence for Liver Support
Milk thistle (Silybum marianum) and its active complex silymarin are among the most researched herbal extracts for liver-related endpoints.
A 2020 narrative review summarized clinical observations in alcoholic and non-alcoholic fatty liver contexts. Multiple meta-analyses published between 2024 and 2025, including studies on metabolic dysfunction-associated steatotic liver disease (MASLD/NAFLD), reported reductions in ALT and AST in some populations, along with modest improvements in certain lipid and insulin-related markers.
Key takeaways from the research
- Silymarin shows antioxidant and anti-inflammatory activity in laboratory studies.
- Enzyme reductions appear in several randomized trials, though clinical significance and consistency vary.
- Histological (liver biopsy) benefits are not consistently demonstrated.
- Results depend on dose, duration, formulation, and patient population.
Safety notes
Milk thistle is generally well-tolerated at standard doses. Interactions with certain medications are possible. It is not a substitute for medical treatment of liver disease.
Is milk thistle proven to reverse liver damage?
No. Current evidence does not support claims of reversing fibrosis or curing liver disease.