Reviewed by Clifton Jackness, MD, attending physician in Endocrinology, Diabetes, and Metabolism at Lenox Hill Hospital and The Mount Sinai Medical Center in New York City Age-related decline of ...

Testosterone is the quintessential male hormone (androgen), and it’s a busy one, helping to regulate intimate function, muscle mass, red blood cell count, mood, and more. But not all testosterone in ...

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.

A testosterone test checks the level of testosterone in your blood. Doctors use it to diagnose conditions caused by too much or too little of the hormone. People with vaginas make testosterone too, ...

DUBLIN — Measuring free testosterone together with total testosterone may provide a more accurate picture than measuring total-testosterone levels alone when it comes to diagnosing deficiency of this ...

Females can have low testosterone that may affect sexual desire and mood, along with other body processes. It can occur with some health conditions, including adrenal insufficiency. Testosterone is a ...

Testosterone boosters include medications and supplements designed to increase testosterone levels in the body. While low testosterone can trigger a range of symptoms, increasing this hormone comes ...