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

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 ...

This article was reviewed by Darragh O’Carroll, MD. Key Takeaways: Testosterone’s reputation for causing anger and aggression ...

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 ...

Know how zinc can boost testosterone levels and increase men's energy through natural food sources and supplements.

The standard cutoff point for low testosterone levels may not be accurate for men in their mid-forties and younger, reports a study in The Journal of Urology ®, an Official Journal of the American ...

This article was reviewed by Lynn Marie Morski, MD, JD. Key Takeaways: Ozempic may help improve testosterone levels in people ...

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