Losing weight is something nearly every American wants to do but, like a lot of things, it's not always good for your health.

However, the new study's findings are alarming. "We gave healthy volunteers a typical drink with xylitol to see how high the levels would get and they went up 1,000-fold," Dr. Hazen told CNN.

Xylitol is a non-glycemic (won't raise your blood sugar) sweetener with a cooling aftertaste produced in plants, fruits, and ...