A new study delves into the evolution and function of the human growth hormone receptor gene and asks what forces in humanity's past may have driven changes to this vital piece of DNA.

Our minds may be affected by winter's long nights or spring's flowers, but what about our bodies? A new study at the Weizmann Institute of Science reveals that our hormones also follow a seasonal pattern.

There's more to low testosterone than a sluggish sex drive. Sure, it's one of the more frustrating symptoms. But it's not the only reason you might be looking to boost your testosterone levels.

There has been an “epidemic” of a clinical syndrome based on low testosterone levels. There is no subject rife with more confusion and misinformation than testosterone deficiency and its treatment. Hopefully, the following 24 questions and answers, pulled from those commonly asked by my patients at office visits, will help enlighten and inform you and clarify misconceptions and falsehoods.