Many young men have the luxury of a speedy metabolism that allows them to scarf down french fries, hamburgers and junk food to their heart’s delight. Damn them. But metabolism and weight aside, a new study says that junk food does impact their junk: Apparently a diet high in junk food could make young men infertile. (But dudes: Please don’t consider nachos an effective method of birth control.)
The new study, conducted by Harvard University and Spain’s University of Murcia, found that 18 to 22 year old men who ate a lot of junk food, particularly foods high in trans-fats, were less fertile than their peers who ate a healthier diet—even if they were a healthy weight and exercised regularly. Those who ate a diet high in whole grains, vegetable and fish had the best fertility.
And another study released on Tuesday shows that moderate exercise can contribute to healthier sperm.
Both studies were relatively small, but the moral of the story seems to be that men who like the idea of eventually having healthy babies should be healthy themselves, too.