The stress hormone cortisol appears to play a role in tough-to-treat type 2 diabetes, a new study finds.

About 1 in 4 people (24%) with tough-to-treat type 2 diabetes have elevated cortisol levels, researchers found.

"These results are significant as they highlig...

Comedian Amy Schumer has disclosed that she has been diagnosed with Cushing's syndrome, a condition that arises when there is too much cortisol in the body.

In an interview published Friday in the News Not Noise newsletter, Schumer revealed she has exogenous Cush...

Five of eight British children who received human growth hormone from the pituitary glands of deceased donors went on to develop early-onset Alzheimer's disease many decades later, researchers report.

Researchers at University College London (UCL) suspect that the growth hormone received by these people in childhood may have contained amyloid-beta protein plaques, which build up in the br...

Transgender people transitioning to male (transmasculine) identity typically take testosterone therapy as part of the process.

There have been worries that the treatment might spur erythrocytosis, an abnormally high concentration of red blood cells in blood that could prove dangerous.

But new research should help allay those fears: The largest study on the subject to date finds no s...

Many breast cancer survivors take a hormonal drug after cancer treatment to stave off a recurrence, but new research suggests these drugs may be less effective in women who are obese.

Breast cancer cells in hormone-positive breast cancers are fueled by the female sex hormone estrogen. Aromatase inhibitor medications lower estrogen levels by stopping an enzyme in fat tissue called aro...

In the face of an ongoing and widespread legal assault on transgender rights -- one that threatens to cut off access to critical aspects of trans health care -- a pair of new studies suggest that gender-affirming medical care is a lifesaving treatment for those who need it.

One study finds that when trans men get immediate access to hormone/testosterone therapy as part of a gender-af...

Millions of stray cats roam the world over, and surgical sterilization has long been the primary method of population control.

But a small new study shows promising results for a one-and-done contraceptive injection.

Researchers say this first-of-its-kind approach appears safe and effective.

"A non-surgical contraceptive that could result in lifetime sterility following a...

If you are one of the millions of people distressed by low libido, help may be on the way in the form of a new hormone shot.

Two new British studies suggest that injections of the hormone kisspeptin could boost sexual desire in men and women. When folks with low sexual desire received kisspeptin shots, areas of their brains charged with feeling sexual desire lit up on scans when they...

The "love hormone" oxytocin might not play the critical role in forming social bonds that scientists have long believed, a new animal study suggests.

Prairie voles bred without receptors for oxytocin display the same monogamous mating, attachment and parenting behaviors as regular voles, according to researchers.

"While oxytocin has been considered 'Love Potion No. 9,' it seems that...

As numerous U.S. states move to restrict transgender health care, a new study shows that such care can substantially improve teenagers' mental health.

The study, published in the New England Journal of Medicine, followed transgender and nonbinary teenagers who received "gender-affirming" hormones -- either estrogen or testosterone -- for two years.

During that time, researc...

When young adolescents strongly identify with a gender that does not match their gender at birth, one option is to offer a reversible treatment that can delay the onset of puberty.

If the desire to transition endures, that delay can be followed with a second step: hormone treatments designed to trigger physical changes that match a young person's true sense of identity. But that begs the ...

Men with Down syndrome may think and remember better when treated with a brain hormone normally associated with fertility, a new small-scale study suggests.

Rhythmic drip doses of