Weight loss hypnosis, what is it and does it actually work? Hypnotherapy has been proven to work and is widely used to treat patients with several disorders, phobias and even pain. Weight loss is a learned behaviour and for those of us who are considered overweight, it all comes down to our relationship with food. The Gastric Mind Band is the alternative to surgery or the NHS's gastric band. Using proven methods in weight loss hypnotherapy, a virtual gastric band can be "suggested" to a person with astonishing results.