Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, ...

What are normal testosterone levels by age? An older photographer mentors a younger one. Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical ...

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

People might think of the NSFW when it comes to testosterone, but there are other symptoms if you have lower levels ...

At last year’s CES, Eli Health announced the Hormometer — an at-home hormone test for cortisol that utilized saliva and a ...

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

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