It's fine once in a while, but doing it every day isn’t recommended. Research suggests artificial flavorings and sweeteners may put you at higher risk for type 2 diabetes and cancer. They can also make you feel hungry more often. Try to avoid anything with sugar, high fructose corn syrup, aspartame, or sucralose. Use lemon, lime, mint, herbs, or cucumbers instead. But don’t forget to wash them first.