Want to Improve Your Fitness? Eat More Egg Yolks

egg yolks
Natasha Breen/REDA&CO/UIG / Getty Images

If you’re an egg whites–only guy, think about changing your order. A study in the European Journal of Preventive Cardiology suggests that vitamin D—which is found in free-range egg yolks—may boost lung health.

Everything You Need to Know About Plant and Animal Proteins, Explained

Read article


Cardiorespiratory fitness, or the ability of the heart, lung, and muscle cells to use oxygen efficiently, is a marker of overall health and fitness. In blood and fitness tests, for every small increase of vitamin D a person had, there was an uptick in VO2 max. While the study did not determine an optimal level of the vitamin, people living in places with less sun exposure should load up on egg yolks and other vitamin D–rich foods, like fatty fish and fortified cereal.

For access to exclusive gear videos, celebrity interviews, and more, subscribe on YouTube!