For men who want to improve their virility, researchers have found a common food that can boost health. And you don’t have to eat that much of it to get its benefits.

An investigation into reproductive wellness shows that the fatty acids in walnuts may be a good way to facilitate the production of healthier sperm.

A study published in the journal Biology of Reproduction reports that young men who ate about two handfuls of the healthful nuts a day for 12 weeks bettered their sperm health. The scientist saw enhancements of sperm shape, movement and strength while chromosome abnormalities were alleviated by including walnuts in the men’s daily diets.

The study involved 117 men ages 21 to 35. Half of the men added 2.6 ounces of walnuts to their daily diet.

The researchers say they want to do further studies to confirm that the improvements in the walnut-eaters are truly significant.