Sheffield Hallam University provides funding as a member of The Conversation UK. Testosterone is the main sex hormone in men. It’s best known for its role in the development of male sexual ...

Testosterone is often called the “male” hormone. However, both men and women produce this hormone. Hormones are molecules that regulate the body. They are usually produced in one location in the body ...

Testosterone tests measure levels of testosterone in the blood. At-home test kits can be convenient, but they cannot diagnose underlying health conditions that cause high or low testosterone. Share on ...

Testosterone levels are at their highest during adolescence and early adulthood. Testosterone levels may start to decline after age 30 years in males and between ages 45 and 55 years in females.

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

Clinicians should use a total testosterone level below 300ng/dL as a reasonable cut-off in support of the diagnosis of low testosterone. The American Urological Association (AUA) has issued new ...

Testosterone boosters are over-the-counter supplements that claim to raise levels of the hormone in the body and reduce symptoms of low testosterone. However, there is not enough evidence to confirm ...

Testosterone therapy can cause secondary erythrocytosis. Erythrocytosis can cause symptoms of hyperviscosity, such as headache, fatigue, blurred vision and paresthesias. A baseline value for ...

If you have low testosterone, it could affect your sex drive. But low testosterone might not be the only reason to blame if you have no libido. iStock/Getty Images You have low testosterone when your ...