I've been pseudo on the Zone for several years. It did work as weight loss when I started and was on it strictly. It's a difficult diet, but it has taught me a lot about carbs. I have a candida problem which is considered pre-diabetic. My doctor says I'm been doing a great job of keeping my sugar level down - it used to be in the pre-diabetic range and now it's high normal. I credit this to the Zone.