Low estrogen linked to flagging sex drive in men: Study
WASHINGTON (AFP) - Many middle-aged men find their waistlines expanding and their sex drive shrinking, symptoms a new study out on Wednesday suggests can be traced to a hormone deficiency - but not the one you might imagine.
Previously, a drop in testosterone production might have been suspected as the culprit, but researchers said a decline in estrogen may be part of the problem.
"This study establishes testosterone levels at which various physiological functions start to become impaired, which may help provide a rationale for determining which men should be treated with testosterone supplements," says Joel Finkelstein, of Massachusetts General Hospital.
But he said, "the biggest surprise was that some of the symptoms routinely attributed to testosterone deficiency are actually partially or almost exclusively caused by the decline in estrogens," Finkelstein said.