Studies on low testosterone, what drives it, when it is real versus a measurement artifact, and what lifts it naturally.
This study looked at whether a man's TyG index tracks with his risk of low testosterone as he ages. The TyG index is a simple score figured from fasting blood…
This study asked how sex hormones relate to the risk of dying, separately for men and women. It analyzed 7,294 U.S. adults in the National Health and Nutrition Examination Survey…
This study set out to see if men's reproductive hormones follow seasonal patterns, as they do in many animals. It analyzed over 12,000 hormone tests from nearly 7,500 men aged…
This study set out to measure whether testosterone in American men had fallen over calendar time, separately from the fall that comes with getting older. It drew 2769 measurements from…
This study set out to track how testosterone changes as men age, and whether the change is aging itself or the illnesses and medications that come with it. It measured…
This study asked whether the ordinary, everyday variation in scrotal temperature is enough to matter for sperm. Sixty men from a group of couples planning their first pregnancy wore a…
This study looked at whether cooling the testicles every day helps men whose couples had been unable to conceive. It followed 64 men who had subfertile semen and a raised…