The point of eating artificial sweeteners is to get the flavor of sugar without subjecting yourself to its disastrous, physique-wrecking effects. Unfortunately, there’s one sweetener out there that raises insulin and shut down fat burning anyway. It has no calories and no sugar, but it’s in a lot of different foods. Kiefer tells you what you need to watch out for.

See all the Carb Back-loading articles.

Read the transcript for part one of the interview with nutrition expert John Kiefer.

Pick up a copy of Carb Back-Loading 1.0, Kiefer’s e-book, at carbbackloading.com