Simple answer: it depends, but here are some guidelines and averages.

Many factors determine how much weight an individual will lose after weight loss surgery, including:

• How well you stick to your nutrition plan
• The type of surgery you’ve had
• How much excess weight you have to lose
• The type of pre-op diet your nutritionist provided, and how well and how long you followed it.

These and similar charts are floating around the Internet. The original sources are unknown, but the numbers seem to be consistent with several websites of bariatric surgeons.

Please contact us if you know where we can find the source for these numbers, information as to how medically accurate they might be or anything else to help to make this post more accurate.