This is surgery performed for an eligible person to induce weight loss, in the interests of their health. It was first performed in the first half on the 1900’s but only in the last few decades has it become commonly performed given the safety of the keyhole techniques, and also the scientific data showing its benefits for a person’s health, life expectancy and daily wellbeing. Different technqiues of the surgery are available and need to be explained by a bariatric surgery specialist.