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Men that supplemented their diet with 60 grams of mixed nuts daily for 14 weeks increased their sperm count by 16%, sperm vitality by 4%, and sperm motility by 6% according to a randomized trial.
The mixed nuts included almonds, hazelnuts, and walnuts which are high in many micronutrients including magnesium, zinc, vitamin E, omega-3 (ALA) and more. The study also found that supplementing with nuts resulted in men having less fragmentation of sperm DNA, which is linked to infertility.