Scientists at the University of California asked a group of young men in their 20s and 30s to eat 75 grams of walnuts every day for three months.
The research found that men managed to increase their sperm count and its quality, potentially giving them a better chance of fathering a child, compared with a group of men who avoided walnuts.
Researchers chose walnuts because they are a major source of "good" polyunsaturated fats, the 'Daily Mail' reported.
Walnuts are rich in omega 3 and omega 6
