What the evidence says raises or protects testosterone naturally, sleep, strength training, vitamin D, losing excess weight, and, just as usefully, what it says does not.
This study set out to see whether exercise training raises resting testosterone in men who were not very active but otherwise healthy. It pooled 11 randomized trials covering 421 men…
This meta-analysis set out to clarify how sleep deprivation affects testosterone levels in healthy men. It pooled data from 18 studies involving 252 men, comparing testosterone levels after partial sleep…
This study set out to find out whether men actually use scrotal cooling devices as directed, and what happened to their semen results when they did. Forty men attending a…
This study set out to see what happens to a man's testosterone when he cuts fat out of his diet, at a time when levels have been falling across Western…
This study tested whether a specially designed cooling garment could lower scrotal skin temperature during ordinary daily life. Three volunteer urologists wore it, with a cold pack inside that was…