Everyone loves a “cheat meal” or an overindulgence of food from time to time. After all, we are human. For seasoned athletes, the idea behind a “cheat” is to eat clean for a period of time, execute workouts as usual, and then “reward” the body with something that’s normally forbidden from a healthy diet.

This strategy can certainly be effective for overcoming a weight-loss plateau and revving up your metabolism, but not all foods should be given the green light, especially if you’ve set an aggressive New Year’s resolution for yourself.

Here, Tim McComsey, a registered dietician specializing in weight-loss programming, shares his eight foods to avoid at all costs.