The findings “support a beneficial role for chronic nut consumption in sperm quality,” they said, but stressed the study participants were all healthy, apparently fertile men.
The potential benefits of nuts for men struggling with fertility have yet to be probed.
For the study, researchers recruited 119 men aged 18-35, who they divided into two groups.
One group ate 60 grammes of almonds, hazelnuts, and walnuts daily on top of their usual “western-style” diet, while the second group got no nuts.
After 14 weeks, the nut group “had significant improvements in their sperm count, vitality, motility (movement) and morphology (shape)” — all associated with male fertility, said a statement.