Topical testosterone most commonly causes skin problems like itching or rash. In those with female anatomy, specifically, it can cause unwanted hair growth, acne, or birth defects in pregnant people.

If you’re taking finasteride — or the brand name versions Propecia or Proscar — you’re probably checking your hairline for changes. But there might be something else you’re worried about changing: ...

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

Xyosted (testosterone enanthate) is a brand-name injectable drug that’s prescribed for testosterone deficiency in some adults. As with other drugs, Xyosted can cause side effects, such as headache, ...

KYZATREX ® is a controlled substance (CIII) because it contains testosterone. It is not known if KYZATREX ® is safe or effective in males younger than 18 years old. Improper use may affect bone growth ...

Medically reviewed by Danielle Weiss, MD PCOS is the most common cause of high testosterone in women, affecting about 10% ...

Axiron, an underarm gel that rolls on like deodorant, is one drug used by men struggling with symptoms of growing older associated with low testosterone such as poor sex drive, weight gain and fatigue ...

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

Testosterone recovery post-ADT is influenced by treatment duration, baseline testosterone levels, and patient age. Younger patients and those with higher baseline testosterone levels recover more ...

Historically, testosterone has been associated with masculinity. Someone having high levels of testosterone was shorthand for perceived higher levels of aggression, strength, and libido. However, ...

Genetics play a role in low testosterone for some men, but underlying causes vary widely. Many genes influence testosterone ...

Starting around age 40, many men notice the first physical changes that may be related to their hormone levels: Energy wanes ...