NEW YORK (Reuters Health) -
Drooping testosterone levels probably don't cut years off a man's life, although earlier studies had suggested they might, according to a new report.
The male sex hormone may simply be a sign of overall health status, which also dips with age. Testosterone levels also fluctuate between countries, races and individuals -- even from one hour to the next.
The new results add to earlier evidence that companies promoting testosterone replacement for "low T" may be jumping to conclusions, or at least reaching beyond the evidence.
There is also no solid research to prove that dips in testosterone will necessarily cause things like grumpiness, lack of energy and decreased libido - or that testosterone therapy will fix them.
Short-term side effects of taking testosterone are swelling around the joints and in the breasts, but the long-term consequences are less clear.
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Study questions testosterone's link to early death
