Total testosterone measures the full amount of the hormone in your blood, while free testosterone represents the small, active portion your body can actually use to support muscle growth, energy, mood ...

I had my hormones checked at CES 2026 — and it turns out I'm doing great ...

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 the primary androgen (male hormone). While it can help you grow a beard, build muscle mass, and develop a intimacy prowess, testosterone doesn’t skyrocket during puberty and then exist ...

Young adult male sitting on a bed with both hands holding his head seemingly having a headache. As men get older, declining testosterone levels are as inevitable as death and taxes. Around the age of ...

Taylor Leamey wrote about all things wellness for CNET, specializing in mental health, sleep and nutrition coverage. She has invested hundreds of hours into studying and researching sleep and holds a ...

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 ...