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 ...

Testosterone is a sex hormone that regulates a number of processes in the human body, including fertility, sex drive, bone mass, fat distribution, muscle mass, and red blood cell production.

Obesity, a condition linked to heart disease and diabetes, now appears to be associated with another health problem, but one that affects only men—low testosterone levels. Results of a study conducted ...

Whenever one experiences growth hormones, peptide hormones, thyroid hormones, stress hormones or sex hormones, the body's chemical messengers play a key role in many essential bodily functions and ...

What you eat or drink may affect levels of the male sex hormone, but whether a diet can increase libido or energy depends on many things. Credit...Aileen Son for The New York Times Supported by By ...

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 ...

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 ...