The following information is excerpted from the the national OPTIFAST® website:

The OPTIFAST®Program has been proven to help overweight people lose weight and – in most cases – for the long term. It succeeds by combining the expertise of physicians, registered dietitians and behavioral counselors with a high-quality, calorie-controlled, nutritional formula in a program that treats the whole person, not just his or her weight.

More than 80 peer-reviewed studies and a clinical database of over 80,000 participants illustrate the efficacy of the OPTIFAST® program. One study of 20,000 patients completing 22 weeks of OPTIFAST® treatment documented a:

For patients with comorbid conditions present at baseline, these improvements are even more substantial. Blood glucose, in particular, has been shown to drop more than 35% from baseline in patients with type 2 diabetes completing only 4 weeks of OPTIFAST treatment.

A study of more than 20,000 participants shows five years after completing the program, the majority kept enough weight off to improve their health long term. That’s testimony to the quality of the OPTIFAST Program – and its providers.