Gastric bypass surgery is a major procedure and therefore has several prerequisites to ensure it’s safe and effective. These typically include: BMI Criteria Generally, gastric bypass surgery is considered for people with a body mass index (BMI) of 40 or more, or a BMI of 35 or more in conjunction with serious weight-related health problems, such as type 2 diabetes, heart disease, or severe sleep apnea. Failed Weight Loss Attempts Gastric bypass is typically considered when serious attempts to lose weight with diet and exercise have been unsuccessful. Psychological Evaluation Candidates must undergo a psychological evaluation to ensure they are mentally prepared for the surgery and the lifestyle changes required afterward. Medical Evaluation A thorough medical evaluation is needed to check for any health conditions that could pose risks during the surgery. Commitment to Lifestyle Changes Candidates must be willing and able to make permanent changes to their diet and lifestyle after surgery. This includes following specific dietary restrictions and committing to regular exercise. Age Requirements Although age limits aren’t absolute, the risk associated with gastric bypass surgery increases for patients over the age of 65. Each patient is unique, so the prerequisites can vary. It’s important to have a comprehensive discussion with the healthcare team to understand if gastric bypass surgery is the right option.