Turn on cookies to sign in
Signing in saves your progress to your Curie account. We can only do that with cookies on — turn them on to continue.
Both surgery and structured dieting cut calories equally in year one — but only surgery keeps them down. A 3-year study found that calorie intake rebounded significantly in the diet group after 12 months, while surgical patients maintained their lower intake. Weight loss also held strong post-surgery, with patients remaining 17–26% below their starting weight at the 3-year mark.
When it comes to long-term calorie control in severe obesity, bariatric surgery has a clear edge over structured dieting — at least after the first year. A prospective cohort study tracking 57 adults over 3 years found that while both approaches delivered similar calorie reductions initially, the diet group saw a significant rebound in energy intake between months 12 and 24. Surgical patients, on the other hand, maintained their lower intake across all three procedure types.
Appetite suppression was also more durable after surgery — particularly sleeve gastrectomy (SG), where pre-meal hunger scores dropped and stayed low throughout the study. Weight loss held steady too, with patients remaining well below their baseline weight at the 3-year follow-up.
By the Numbers:
Why it matters: These findings reinforce the long-term value of bariatric surgery for severe obesity — not just for weight loss, but for sustained appetite and calorie control. They also highlight the need for ongoing dietary counseling and support for patients who opt for non-surgical interventions.
