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 ...

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

Men's testosterone levels remain pretty steady until age 70. After that, production of the male sex hormone starts to decline, new research indicates. This begs the question: Is testosterone loss ...

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

Numerous factors -- including body mass index (BMI), lifestyle, relationship status, and a number of disease states -- were tied with declining testosterone levels in men over 70, researchers found.

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

Understanding Testosterone Replacement Therapy and Its Alternatives Clearwater, United States - January 5, 2026 / The ...

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 ...