WASHINGTON (Reuters) - Estrogen fuels feelings of power and competition in women in much the same way testosterone does in men, researchers said on Wednesday in a study that shows the need to win is ...

Testosterone is a naturally occurring steroid hormone. Despite its status as a steroid, prescription testosterone replacement ...

Low circulating testosterone in older men is linked to an increased risk for Alzheimer disease (AD), suggesting that the hormone somehow protects the brain. But is it really the testosterone that ...

Please provide your email address to receive an email when new articles are posted on . Women with complete androgen insensitivity syndrome randomly assigned to receive daily testosterone therapy for ...

Despite epidemiological studies suggesting a link between endogenous testosterone levels and increased risk of breast cancer in postmenopausal women, the use of hormone therapies containing androgens ...

Certain healthy foods and supplements may negatively impact testosterone levels when consumed in excess, according to experts ...

Transgender men treated with testosterone therapy did not experience increases in estradiol levels after 6 years of follow-up, but BMI decreased with increasing testosterone levels, according to ...

What used to be a niche treatment for men with legitimate medical conditions has morphed into "youth and vigor" as a ...

Lower levels of sex hormones might be tied to tears of the shoulder's rotator cuff in men and women, a new study suggests. Among women with low levels of estrogen, researchers found the odds of a ...