"The message is there isn't strong evidence for a benefit from these products – and there's potential evidence for harm," Dr. Azad said.
Dr. Azad, however, says it's likely safer to steer clear of nonnutritive sweeteners in general. She offered this advice: "I'm going to say that you should drink water."
You may find this interesting: Sugar Substitutes Linked to Weight Gain and Health Problems
Stevia is an all natural sweetner.