The obese patients are at high risk of diabetes and cardiac ailments. Bariatric surgeries aim at reducing their food intake by making their stomach smaller. Using Bariatric surgery, the amount of food you can eat and digest is limited by changing the anatomy of your digestive system. For those who are fat with a BMI of at least 40 and others with a BMI of 30 and suffering from some serious medical conditions like diabetes, it is vital that the bodyweight is decreased to a safe level. Bariatric surgery is supposed to gain this. Bariatric surgery is an excellent method for overweight people who cannot follow weight loss program or exercise. By reducing stomach size or resulting in decreased absorption of nutrients and sometimes both, Bariatric surgery yields great health benefits in cases like Type-2 diabetes and also in prevention of cancer.