Pete Hegseth's testosterone plan is exposing a bigger cultural issue: an unhealthy obsession with masculinity.

It's natural for testosterone to fluctuate, but sleep, diet and other factors can affect a man's levels on a daily basis.

Kennedy Jr. once claimed that the president’s testosterone levels are unusually high for a man of his age, and Kennedy is known to take a supplementary dose of the male sex hormone himself. In April, ...

Is there any science behind the policy of screening soldiers' testosterone levels? If not, then what are the reasons for it, ...

U.S. Defense Secretary Pete Hegseth says the screenings will boost the military’s readiness and resilience, but doctors express caution.

Defense Secretary Pete Hegseth says he's rolling out a new screening program for “testosterone deficiency” among troops.

T” military, medical experts say testosterone therapy requires careful diagnosis and monitoring — not a masculinity mandate.

Concerns over the welfare of sailors aboard the Lincoln raise a bigger question: does the Pentagon have its priorities straight?

Treatments to raise testosterone may not achieve the performance and longevity boost Hegseth is aiming for.

Servicemembers aged 30 and older would be tested every year during their annual health assessments, Defense Secretary Pete Hegseth said.

The Pentagon now requires annual testosterone screening for service members 30 and older, raising questions about treatment ...

The defense secretary said the Pentagon will test the testosterone levels of troops 30 and over. It was unclear if the plan would affect women or military fitness rules.