Myth-buster
A meta-analysis of 2,069 people with fatty liver disease found silymarin (milk thistle) lowered ALT by just 1.10 U/L — a change so small it could be due to chance.
This null finding challenges the popular belief that milk thistle reliably improves liver enzyme levels, but the evidence is too low-quality and the study too early in the research arc to call the question settled.
The analysis pooled 309 participants across four trials and found that silymarin (the active compound in thistle) reduced ALT — a liver enzyme that can indicate liver stress — by a tiny, statistically insignificant amount. The same study also found no effect on two other liver markers (GGT and AST), and the overall evidence was rated 'very low certainty' due to short follow-up (4 to 48 weeks) and small sample sizes.
Where this fits in the evidence
This is among the first studies we've indexed on Thistle for Reduced Alanine Transaminase Level — treat it as an early signal until more research accumulates.
The study
Silymarin for adults with metabolic dysfunction-associated steatotic liver disease.
- Meta-Analysis
- n = 2,069
- 2025-06-24
- The Cochrane database of systematic reviews
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.