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 systematic review and meta-analysis set out to see whether vitamin D supplements raise testosterone or related markers in men. It pooled randomized trials measuring total testosterone, SHBG (sex hormone-binding…
This study looked at whether vitamin D3 supplementation improves hormone levels and semen quality in infertile men. It pooled data from six randomized controlled trials involving 945 men, measuring changes…
This meta-analysis (a study that statistically pools many earlier studies) looked at how body mass index (BMI, a weight-for-height number used to flag over- or under-weight) relates to sperm quality…
This systematic review and meta-analysis set out to assess whether coenzyme Q10 (CoQ10) supplementation improves semen quality and male hormone levels. It pooled data from eight randomized controlled trials involving…