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

Three forms of testosterone are found in serum: sex hormone-binding globulin (SHBG)-bound (60%-70% of total), albumin-bound (20%-30% of total), and free (1%-3% of total). SHBG-bound testosterone is ...

This article was reviewed by Felix Gussone, MD. If you’ve been feeling a bit more couch potato than go-getter lately, dragging through the day, snapping at people for no reason, or wondering where ...

Starting around age 40, many men notice the first physical changes that may be related to their hormone levels: Energy wanes ...

New U.S. dietary guidelines for the first time include advice for men on maintaining healthy testosterone levels.

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

Researchers at the University of Southern California (USC) have managed to grow human, testosterone-producing cells in the laboratory, a development that could lead to improved treatment of low ...

Certain healthy foods and supplements may negatively impact testosterone levels when consumed in excess, according to experts who study hormone health.

(CNN) — You’re feeling unusually tired and sad, and your interest in sex has dropped off. That’s no fun. If you’re a guy, you may be thinking you have low testosterone. Wait a minute. Don’t we all ...