Citation: Anonymous. "Milk Thistle Gynecomastia: An Experience with Milk Thistle (exp98457)". Erowid.org. Dec 3, 2012. erowid.org/exp/98457
I took Milk Thistle extract (175 mg of the 80% standardized extract) daily for several months to help with liver function and developed gynecomastia (no, I never used steroids). Many other men have experienced this side effect as well, just google 'Milk Thistle gynecomastia'.
If you are a male, I strongly suggest you consider other sources of anti-oxidants or different supplements for liver support.
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