Testosterone declines gradually, and the signs are easy to overlook or misinterpret. Here’s how doctors evaluate hormone levels and what to consider before pursuing therapy.

Testosterone has become the new hustle hormone. Scroll through social media for five minutes and you’ll see men crediting weekly injections for sharper focus, bigger lifts, stronger sex drives, and ...

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

This article was reviewed by Felix Gussone, MD. Testosterone plays a major role in many aspects of men’s health, including drive, reproductive function, muscle mass, and mood. So if your levels dip ...

Does biology determine destiny, or is society the dominant cause of masculine and feminine traits? In this spirited exchange, the psychologist Cordelia Fine and the evolutionary biologist Carole ...

Whether you’ve searched the internet far and wide for the best TRT clinics, can’t seem to escape posts about ‘Low T’ on ...

Hormones are complicated. Even though some "rock star" hormones become household words and seem to fit neatly in a box that explains human behavior, all too often the pop psychology reputation of a ...

Can boosting testosterone improve libido, or is much of the attention solely hype, profit, and placebo?

Testosterone’s reputation for causing anger and aggression is overstated — the science shows a more complex story. High, non-medical doses of anabolic steroids — which are technically testosterone — ...