now that feeling when you’ve eaten a lot of something high-calorie, high-sugar, and/or high-fat you know you shouldn’t have?! You’re not alone. But when a food is labelled ‘low-fat’ and you eat a lot of it, studies show you will actually feel less guilty about eating it, especially if you’re overweight already. Labelling snacks as low-fat means people increase the serving size, regardless of whether the snack is healthy or unhealthy, according to one study.