Research published in The New England Journal of Medicine indicates that men need both testosterone and estrogen to maintain a healthy sex drive and body weight.
Though the amount of testosterone men need to stay strong, trim and become aroused varies, Joel S. Finkelstein, M.D., endocrinologist with the Massachusetts General Hospital, and his colleagues affirmed that “Androgen deficiency accounted for decreases in lean mass, muscle size and strength; estrogen deficiency primarily accounted for increases in body fat; and both contributed to the decline in sexual function.”
The 11 authors of this research studied physiological impacts of testosterone levels, estradiol levels or both when diagnosing testosterone deficiency in men. The study involved monitoring more than 300 men ages 20 to 50 who were given a drug to suppress testosterone and estradiol production over a 16-week period.
Estradiol, a sex hormone, is the most active estrogen in reproductive age women. It is also present in men as an active metabolic product of testosterone, which is a steroid hormone and androgen essential in the development and function of male psychological characteristics.
These individuals were given a placebo gel or different strengths of a testosterone gel prescribed to men diagnosed with testosterone deficiency. Approximately 202 of the men participating in the study were given anastrozole, which suppresses the conversion of testosterone to estradiol.
Across the board, researchers observed changes of body fat levels and lean muscle mass in these men. More specifically, they saw an increase in body fat and decrease in lean mass in the men receiving the placebo and men applying only 1.25 grams of testosterone gel daily. Moreover, sexual desire dropped when testosterone dosage was reduced.
Essentially both sexes need both hormones to have libido. So if estrogen is not an effeminate hormone that makes guys get girly, then testosterone in women wouldn’t make them macho.
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