Testosterone is an important hormone. It helps men develop during puberty, and as they age, it plays a critical role in helping control fat levels, cholesterol, and glucose levels. Testosterone ...

Testosterone levels in men naturally decline with age. After age 40, it may drop about 1 to 3 percent a year. Maintaining a ...

Low testosterone levels can cause side effects ranging from low libido and mood to muscle loss. A urologist said more men should get tested so their doctors can see how their hormone levels change ...

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 ...