You consume artificial sweeteners
Call it the catch-22 of calorie-free drinks and low-sugar desserts. “Because non-nutritive sweeteners, or artificial sweeteners, are many times sweeter than sugar, [consuming them] trains your taste buds to appreciate hypersweet flavors,” says Atlanta–based nutritionist Marisa Moore, RD. “This may make it difficult for fruit and other less-sweet foods to measure up to that expectation.” In other words, after a steady diet of fake sugar foods, regular sugar is a letdown for your taste buds. So you finish off that tub of mint chocolate chip to try to make up for it.