Gastric bypass is surgery that helps you lose weight by changing how your stomach and small intestine handle the food you eat. After the surgery, your stomach will be smaller. You will feel full with less food. The food you eat will no longer go into some parts of your stomach and small intestine that absorb food.

It affects every system in the body with notable strong associations with diseases that include high blood pressure, diabetes, heart disease, sleep apnea, nonalcoholic fatty liver disease, arthritis, polycystic ovarian syndrome and female infertility. Reducing your weight will help decrease the risk of developing these conditions. If you already suffer from these diseases, reducing your weight will improve your condition or in some cases, may even resolve them.