“Eating is a rest-of-your-life thing,” says Teresa Fung, a professor of nutrition at Simmons College. That means whatever your diet plan is, she and other nutritionists want you to be able to stick with it long-term. Unless you have god-level willpower, you’re not going to be able to resist sugar forever—and in fact, nutritionists don’t want you to. Fung explains that regardless of the diet you pick, if you go off of it once you’ve lost whatever weight you want to shed, you’ll just end up gaining it back later and losing the benefit of dieting in the first place. It’s far better for your long-term health to learn how to make better choices than it is to diet intermittently.