A study led by researchers from the Massachusetts General Hospital (MGH) has found that 300 milligram (mg) doses of androstenedione -- a dietary supplement used by some athletes -- can raise blood testosterone levels in healthy young men. The report, in the Feb. 9 issue of the Journal of the American Medical Association also showed an increase in estrogen levels with both 100 and 300 mg doses. It did not examine whether taking androstenedione increases strength or muscle mass or whether androstenedione has long-term side effects.
The above story is based on materials provided by Massachusetts General Hospital. Note: Materials may be edited for content and length.
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