Rapid Diet Shark Tank with regards to Weight Loss Surgery There is no supérieur road to instant weight-loss. The only way to lose excess weight is to reduce the body's caloric intake below its daily caloric needs. When this happens, the body begins to use stored energy (fat) to hold functioning. Weight loss surgery can be a minimally invasive medical procedure designed to counter a patient's obesity by limiting the amount of food - and thus calories - that he or she can consume.