Peer-reviewed research concerning sperm health, summarized and appraised in plain language with every source cited.
This study set out to review how different weight loss methods affect male fertility in men with obesity. It looked at 32 studies that compared lifestyle changes, medications, and bariatric…
This study set out to examine whether astaxanthin (a potent antioxidant) could improve sperm quality after freezing and thawing. It pooled data from multiple studies to see how astaxanthin affected…
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 study set out to see if sticking to a Mediterranean diet (MedDiet) is linked to better sperm quality and fertility outcomes in men. It pooled data from 11 studies,…
This study set out to clarify how bisphenol A (BPA, a chemical used in food packaging and container linings) affects men's reproductive health. It pooled 18 studies that measured BPA…
This systematic review and meta-analysis set out to find which lifestyle, environmental and health factors go with higher sperm DNA fragmentation, meaning breaks in the genetic material inside sperm, where…
This study set out to examine global trends in sperm count over the past several decades. It pooled data from 223 studies, including semen samples collected from men worldwide between…
This meta-analysis set out to work out how high ambient temperature affects sperm quality. It pooled nine studies covering 356 men in Iran, Italy, Thailand, China and Egypt, comparing men…
This meta-analysis set out to see whether omega-3 fats improve sperm in infertile men. It pooled three randomized trials, 147 men on omega-3 and 143 on control treatments, and measured…
Infertility affects about 15 percent of the world's population, which is what makes this question worth asking. This systematic review and meta-analysis pooled randomized trials testing whether nutrients, dietary supplements…
This study set out to see whether zinc in semen is linked to male infertility and whether zinc supplements improve sperm. It pooled 20 studies, comparing zinc levels and sperm…
This meta-analysis set out to see if coenzyme Q10 (CoQ10) supplements improve male fertility, focusing on live birth and pregnancy rates, sperm concentration, and sperm motility. It pooled data from…