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What is obesity?

Obesity is defined as having a body mass index (BMI) of 30 or more. BMI is a measure of your weight in relation to your height.

  • Class 1 obesity means a BMI of 30 to 35
  • Class 2 obesity is a BMI of 35 to 40
  • Class 3 obesity is a BMI of 40 or more
  • Classes 2 and 3, also known as severe obesity, are often hard to treat with diet and exercise

Bariatric surgery is a treatment option if you have severe obesity and are unable to lose weight or you keep gaining any weight you lost using other methods such as lifestyle treatment or medications. Bariatric surgery also may be an option if you have serious health problems, such as type 2 diabetes or sleep apnoea, related to obesity. Bariatric surgery can improve many of the medical conditions linked to obesity, especially type 2 diabetes.

Bariatric surgery can be done both by Laparoscopic surgery and open surgery.

What is bariatric surgery?

Bariatric surgery is an operation that helps you lose weight by making changes to your digestive system.

  • Some types of bariatric surgeries make your stomach smaller, allowing you to eat and drink less at one time and making you feel full sooner.
  • Other bariatric surgeries also change your small intestine—the part of your body that absorbs calories and nutrients from foods and beverages.

Does bariatric surgery work?

Studies show that people who have bariatric surgery lose about 15 to 30 percent of their starting weight on average, depending on the type of surgery they have. However, no method, including surgery, is sure to produce and maintain weight loss. Some people who have bariatric surgery may not lose as much as they hoped. Over time, some people regain a portion of the weight they lost. The amount of weight people regain may vary. Factors that affect weight regain may include a person’s level of obesity and the type of surgery he or she had.

Bariatric surgery does not replace healthy habits, but may make it easier for you to consume fewer calories and be more physically active. Choosing healthy foods and beverages before and after the surgery may help you lose more weight and keep it off long term. Regular physical activity after surgery also helps keep the weight off. To improve your health, you must commit to a lifetime of healthy lifestyle habits and following the advice of your health care providers.

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