High-Fat Dangers

High-fat diets may harm sperm, according to a small study published in the journal Human Reproduction.
The research found that guys whose diets were high in fat had a 43 percent lower sperm count and 38 percent lower sperm concentration than those who ate the least fat.

 Saturated fat, found in fast food, red meat and dairy, was a major culprit in sperm quality. On the other hand, men who ate plenty of omega-3s — the “good” fats found in fish — had more sperm that were formed correctly.