How Much Weight Will I Lose After a Gastric Bypass?

I have quite a lot of weight to lose, probably around 300lbs. How much am I likely to lose after having a gastric bypass?

Doctor Answers 2

Weight loss amount with gastric bypass

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Most patients after gastric bypass surgery will lose 70  - 80% of their excess weight in in the first 12 months. Unfortunately some patients will regain 10 - 20% of the excess weight over the following 3 - 5 years resulting in long term 60% excess weight loss. Close follow-up and having a surgeon with a comprehensive multidisciplinary team can give you better results.

Expected weight loss after gastric bypass surgery

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The average excess weight loss for gastric bypass surgery at one year is approximately 75 to 85%. So if your excess weight is 300 pounds you will probably lose 225-255lbs in the first year. However, if you exercise and eat properly more weight loss can be achieved. At five years, the average excess weight loss is approximately 65%.

David Buchin, MD
Long Island Bariatric Surgeon

These answers are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.