A randomized, parallel, 2-group, dietary intervention trial shows that daily consumption of 75 g of whole-shelled walnuts appears to have positive effects on the vitality, morphology, and motility of sperm in healthy men after 12 weeks.
of the men were randomly assigned to a control group, the other 50% were assigned to walnut supplementation group for a 12-week trial. The authors revealed that sperm vitality, motility and morphology were significantly improved in the walnut group compared with the control group after 12 weeks. In addition, serum omega-3 and omega-6 fatty acid levels were significantly improved in the walnut group after 12 weeks. The prevalence of sperm missing a sex chromosome were significantly lower in the walnut group after 12 weeks of supplementation. (read more)