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 ...

That unexplained exhaustion or sudden change in your body might not be just stress or aging. Medical experts are seeing more men experiencing testosterone deficiency, often without realizing what’s ...

If you’ve been feeling a little low in more than one aspect of life, you’re not alone, and chances are you’re not going crazy, either. You may be experiencing the symptoms of low testosterone.

Low testosterone can cause fatigue, low libido, mood changes, muscle loss, and bone weakness.

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In practice, Will’s increased T levels have seen his performance in the gym improve massively. Over 28 days he added 10kg to ...

Many men believe that feeling tired, gaining weight, losing motivation, and struggling with libido is just part of getting older. It’s not.

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 ...

Dear Doctor K: I'm a 68-year-old man who has been feeling more tired and less "sexy" over the past several months. My doctor says my blood testosterone level is normal, but "low normal" — a little bit ...