Actually it does work...and quite well. One study I was reading said that of three groups at 1200 calories a day and exercising for 40 minutes a day the group that supplemented with hypnosis lost 15 to 20 % more weight and maintained the weight loss longer. They also found the healthy lifestyle much easier to adapt too. Group 2 used diet and exercise only and had predictable steady weight loss and good results with keeping the weight off after 1 year. Group 3 used supplements such as weight loss pills, diet shakes and no exercise experience no weight loss and some actually gained weight..

Here is a place that reviews a bunch of weight loss programs, dieting aides, supplements and so on. The site even has categories like diabetes, low fat and hypnosis. You may find some information on hypnosis. Pretty cool site.

http://www.reviewplace.com/cat-135-Diets...

Many of the products and programs listed have consumer reviews, so you can read what others think before you decide on one for yourself.

Hope this helps!