What’s standing between you and your next promotion? It could be the fast food you had for lunch!

According to a study in the Journal of Occupational and Environmental Medicine, workers who eat junk food get less done, and are less productive overall. Here are the details:

The researchers followed thousands of workers for 3 years. The volunteers were periodically surveyed about their job performance and exercise habits, and the types of food they ate. Then, researchers compared the self-reported information to each person’s performance reviews. The result:

Employees who ate 5 or more servings of fruits and vegetables a day were 20 percent more likely to be classified as “top producers.”  And the people who hit the gym 3 days a week added another 15-percentage points to their performance ratings. Plus, the healthy-eaters took 27-percent fewer sick days than their junk-food-eating coworkers.

And there you have it. Eating right and exercising doesn’t just give you a healthy body. It also gives you a healthy career.