This article was reviewed by Darragh O’Carroll, MD. Hormonal Brain Fog: What It Is and What to Do About It Key Takeaways: ...

Testosterone is the primary androgen — or male hormone — in your body. Low testosterone affects up to 39 percent of adult men in the US over the age of 45, and becomes increasingly prevalent as men ...

Men with below-normal testosterone levels had a 40 percent higher risk of death from any cause compared with men with levels in the high-normal range. Men with extremely low T were about 60 percent ...