ingestible · for liver support & detox
Milk Thistle (Silymarin)
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Take 140 mg of standardized silymarin (70-80% silymarin content) two to three times daily with meals. Most clinical trials use 420 mg/day total. Look for products standardized to silymarin percentage rather than raw seed weight. Allow 8-12 weeks of consistent use before assessing results.
How it works
Silymarin - the active flavonolignan complex in milk thistle seeds - acts as an antioxidant that scavenges free radicals, inhibits inflammatory signaling (NF-kB pathway), and may stabilize hepatocyte cell membranes to reduce uptake of hepatotoxic substances.
Where to buy
Health food stores (Whole Foods, Sprouts), pharmacies (CVS, Walgreens), and online retailers. Look for standardized extracts (70-80% silymarin) from brands such as Thorne, NOW Foods, or Nature's Way.
Typical cost: $10-25/month
Safety notes
Avoid if allergic to plants in the Asteraceae/Compositae family (ragweed, chrysanthemums, marigolds, daisies). May cause bloating, nausea, or gas. Safety in pregnancy and breastfeeding is unestablished - avoid unless under medical supervision. Laboratory studies suggest potential inhibition of CYP2C9 enzyme, which could theoretically affect warfarin metabolism; consult your doctor if you take warfarin or other anticoagulants. Does not replace medical treatment for diagnosed liver disease.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
Annals of Hepatology 2024This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.