It's a sugar alcohol, but it doesn't cause gas like maltitol and other scary sugar alcohol sweeteners I recently bought a bag of zSweet, which is an all natural sweetener made from erythritol. I'm planning to 'cluck' about it on the main site this weekend. I used it in beverages and brownies (a regular batch and a batch with zsweet) and took photos of the finished products for comparison, and of course did a proper taste test