Gastric sleeve (sleeve gastrectomy)
Removes roughly 80% of the stomach, leaving a narrow "sleeve" shape. This restricts food intake and reduces production of hunger-related hormones. Technically simpler than bypass, with a somewhat shorter recovery.
Gastric bypass
Creates a small stomach pouch and reroutes the small intestine to connect to it, bypassing part of the digestive tract. This both restricts intake and reduces nutrient absorption, generally producing more effective results for diabetes management specifically, at the cost of higher procedure complexity.
How surgeons generally think about candidacy
- Sleeve — often preferred for patients without significant diabetes, or those wanting a technically simpler procedure
- Bypass — often preferred when diabetes management is a primary goal, given its generally stronger metabolic effect
What both share
Both require pre-op dietary preparation, carry lifelong dietary adjustment requirements, and need long-term nutritional monitoring — neither is a procedure with a truly finished endpoint the way a single-session cosmetic procedure is. See colombiamedical.co for Colombia-specific bariatric program information.
The Takeaway
This is a decision for you and your surgeon based on your specific health profile — not a general "which is better" question with a universal answer.