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

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 ...

Certain health conditions can make it difficult for some men to have normal levels of testosterone. Low testosterone levels, also known as hypogonadism, can affect a person’s life, can cause different ...

The findings indicate that the average testosterone levels in men have been diminishing year over year. What's particularly troubling is that this decrease isn't solely attributed to the natural ...

NEW YORK (Reuters Health) - A new oral testosterone undecanoate formulation can restore testosterone concentrations to normal in hypogonadal men, researchers report. "Effective as other testosterone ...

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

For those who need it—men who have low levels of testosterone with symptoms such as low energy, a low libido, and depression, ...

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

For many guys, having low energy isn’t simply a result of a rough night of sleep or a demanding workweek—it might be low testosterone levels at play. Testosterone is an androgen (or male hormone) that ...

Odds are, you’ve heard of “Low T.” That’s the pharmaceutical industry’s name for testosterone deficiency in men. There’s a lot of attention given to treating it, but far less emphasis on a national ...

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 ...