The idea behind a raw food weight loss diet is that you will lose weight pretty much automatically. This happens because you will not be eating sugar or other refined carbohydrates. You will be eating a lot more fiber than most people would eat on a regular diet and that keeps the stomach full so that you feel less hungry on fewer calories. The food that you do eat is natural, healthy and easily processed by the body, once you are used to it.
However, a raw food diet is not easy. Many people do not think about what raw food actually means before they start, so they have a bad shock when they find out how limiting the diet is.
In most cases, it is best to transition from a regular western diet to raw. The increase in fiber as well as the detox element can cause a lot of side effects in the first 7 days. Just coming off coffee gives most people bad headaches if done cold turkey.
However, for people who are very overweight, transitioning is hard. Transitioning is usually done by starting out with a 100% raw breakfast, followed by two other meals of healthy cooked foods. Then lunch goes raw, and finally dinner. This is difficult for many overweight people because we usually prefer to jump right into a diet, taking advantage of high motivation to follow the strictest part of the diet first. With a raw food diet, you do the opposite.