Consuming 75g of whole-shelled walnuts daily improves sperm vitality, motility, and morphology in young men adhering to a Western-style diet.
Randomised Controlled Trial Sperm Quality Walnut
A random-led, two-group dietary intervention trial with single-blind outcome assessment was administered to 117 healthy men ranging from 21 to 35 years, all eating a Western-style diet. The main aim was to examine any changes in conventional semen parameters and sperm aneuploidy after 12 weeks, with changes in blood serum and sperm fatty acid profiles, sex hormones, and serum folate as secondary endpoints. The half of participants tasked with eating walnuts displayed improvements in sperm vitality, motility, and morphology, while no changes were seen in the control group that continued their normal diet and avoided tree nuts.
The outcomes displayed that the group which had taken walnuts showed improvement in terms of their sperm vitality, motility, and morphology. There were also enhancements in serum fatty acid profiles, including increase in omega-6, and omega-3 amongst the walnut consuming group. No such improvements were observed in the control group. Furthermore, sperm aneuploidy was shown to have a reverse correlation with sperm alpha-linolenic acid, particularly in sex chromosome nullisomy.
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