Don't "Diet," Eat Healthy Instead One of the biggest problems with "diets," is that they  almost never  work in the long term. If anything, people who "diet" tend to gain more weight over time, and studies show that dieting is a consistent predictor of future weight gain (53). Instead of going on a diet, make it your goal to become a healthier, happier and fitter person. Focus on nourishing your body, instead of depriving it. Weight loss should follow as a natural side effect.