testosterone

Feminizing hormone therapy involves taking estrogen through a pill, patch or injection, often with a separate drug to block the body’s natural testosterone.

Symptoms of this condition in present-day males, known as Klinefelter syndrome, include low testosterone, lack of facial and body hair, enlarged breasts and learning and language-related problems.

Plasticizers are found in most plastics – like water bottles and food containers – and exposure is associated with negative impacts on testosterone and semen health.

Among them, athletes must demonstrate lower testosterone levels for 12 months before competing, and athletes can only qualify four years after transitioning, at the earliest.

While dogs can track the scents of prey animals in the woods, humans outperform canines in smelling ripe fruit, and we can sniff out testosterone and DNA in potential mates to help us choose the right match.

In the male-dominated, testosterone-fueled market of 1960s New York real estate, Cecilia Benattar was in a class all her own.

The hormonal fuel for both impulses is the same: testosterone.

First words, then shoves, were exchanged, and finally, testosterone thick in the air, a few blows were thrown.

The man, a walking cloud of testosterone, says this with utmost sincerity.

The logic of letting people get back to their natural level of testosterone,” Yesalis suggests, “makes common medical sense.

"We've managed to get some testosterone from a blond homunculus," he reported.