Tamoxifen Found in Bodybuilding Supplement — Physician’s First Watch
Tamoxifen Found in Bodybuilding Supplement
By the Editors
"Esto Suppress," a dietary supplement used by bodybuilders, contained tamoxifen in three of four samples tested, according to a letter in BMJ.
The letter says bodybuilders have used tamoxifen to prevent the gynecomastia associated with steroid use. At the two-capsule-per-day dosage recommended on the label, the amounts of tamoxifen found in the samples (1 to 4 mg per capsule) were somewhat lower than doses used clinically to treat gynecomastia (10 to 20 mg).