Candidates normally fall into the clinical classification of “obese”. That typically translates to a body mass index of 40 or over. You should have previously attempted to lose weight through traditional methods, including dieting, nutritional counselling and commercial or NHS run weight-loss programs. Candidates may have a body mass index of 35 or over if they have medical problems that are associated with obesity, such as hypertension and diabetes.
People with an inflammatory disease, severe heart or lung disease, oesophageal, stomach or intestinal problems, cirrhosis or who are pregnant are not candidates.