Methoxyisoflavone
"Methoxyisoflavone is a member of the family of flavonoids (isoflavones). In a U.S. patent, the developers of this substance claim, based on preliminary animal research, that it possesses muscle-building and bone-building (anabolic) effects without the side effects seen with either androgenic (male) hormones or estrogenic (female) hormones."
"Several substances similar to methoxyisoflavone are found in many plants and some foods, including soybeans. Whether methoxyisoflavone itself is found in nature is unknown."
Athletic performance
"Methoxyisoflavone is not an essential nutrient, so no deficiencies are possible."
Manufacturers of methoxyisoflavone recommend 200 to 400 mg twice a day.
"Hormones with anabolic effects on muscle often have side effects that include acne, male-pattern baldness, prostate enlargement, and lower high-density lipoprotein (HDL; “good”) cholesterol. Whether methoxyisoflavone can cause these side effects has not been investigated. At the time of writing, there were no well-known drug interactions with methoxyisoflavone ."