Testosterone is the quintessential male hormone (androgen), and it’s a busy one, helping to regulate intimate function, muscle mass, red blood cell count, mood, and more. But not all testosterone in ...

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 ...

What are normal testosterone ranges? Diagnosing low testosterone can be tricky, even for urologists like me. That said, a total testosterone level below 300 ng/dL (nanograms per deciliter) is ...

This article was reviewed by Felix Gussone, MD. Key Takeaways: In the U.S., testosterone is a controlled substance, so you’ll ...