Gastric bypass
Gastric bypass reduces the size of the stomach and changes digestion to promote lasting weight loss and improve metabolic health in patients with obesity.
+4,000 bariatric procedures
Carried out by Dr Dick Manrique
Reference procedure
Long-term clinical evidence
Roux-en-Y gastric bypass
Roux-en-Y gastric bypass is a metabolic surgery that reconfigures the digestive tract to regulate the gut-brain-pancreas axis. By accelerating the passage of nutrients to the distal intestine, it stimulates a potent hormonal and incretin response (↑GLP-1 and ↑PYY) that reduces appetite, increases satiety and improves glucose control, with additional metabolic changes in the microbiota and bile acids.
Health benefits
Shrink your stomach to eat less
It promotes sustainable weight loss
Prolongs the feeling of fullness
Improves obesity-associated comorbidities
When is gastric bypass recommended?
Roux-en-Y gastric bypass is indicated for patients with obesity seeking to achieve long-term weight loss and improve metabolic health.
BMI ≥ 40
With or without associated metabolic comorbidities.
BMI ≥ 35
With comorbidities such as type 2 diabetes, hypertension, dyslipidaemia, MASLD (fatty liver) or GORD.
BMI ≥ 30
With type 2 diabetes or uncontrolled arterial hypertension despite optimal medical treatment.
Revision surgery
As a conversion from sleeve gastrectomy due to severe gastro-oesophageal reflux, oesophagitis or Barrett's oesophagus.
Every case is unique. A personal assessment will allow us to define the most appropriate treatment for you.
Why is gastric bypass still the gold standard procedure?
Roux-en-Y gastric bypass remains the gold standard procedure against which all other bariatric surgeries are compared. Its robust scientific backing confirms excellent results in weight loss and improvement of comorbidities.
Backed by clinical evidence
Type 2 diabetes
Greater long-term remission and less medication vs intensive medical treatment
ARMMS-T2D RCT JAMA, 2024Weight loss
Greater weight loss and more long-lasting results vs gastric sleeve
OSEBERG RCT Lancet Diabetes Endocrinol, 2025Blood pressure
Better control and reduced need for antihypertensives compared to intensive medical treatment
GATEWAY RCT JACC, 2024Liver health (MASH)
Higher histological resolution of MASH without worsening of fibrosis vs intensive medical treatment
Lancet, 2023BRAVES RCT Lancet, 2023
Cardiometabolic health
Improvement of triglycerides and HDL cholesterol, promoting long-term cardiovascular health
STAMPEDE RCTNEJM, 2017
A&E
Better reflux control than the sleeve; the sleeve presents more pathological reflux at 5 years
The SLEEVEPASS RCT JAMA, 2024Sleep apnoea
Frequent long-term improvement or remission, with similar results vs gastric sleeve
The SLEEVEPASS RCT JAMA, 2024Nutritional security
Safer long-term nutritional profile than one-anastomosis gastric bypass (OAGB)
YOMEGA RCT Lancet, 2024Roux-en-Y gastric bypass is the most studied bariatric procedure in the world, supported by decades of high-quality clinical evidence.
Which bariatric option is right for you?
Results vary depending on your health, habits and adherence to the treatment plan.
| Comparison | Gastric bypass | Gastric sleeve | Gastric band | Gastric balloon |
|---|---|---|---|---|
| Ideal for | BMI ≥ 35 with comorbidities or gastro-oesophageal reflux | BMI ≥ 35 with associated comorbidities | Obesity with comorbidities | BMI ≥ 27 with any comorbidity |
| Main objective | Weight loss and metabolic control | Weight loss and metabolic control | Weight loss | Weight loss and lifestyle change |
| Average weight loss | 32.8% TBWL | 28.9% TBWL | 17.3% TBWL | 15% TBWL (Spatz3 balloon) |
| Inpatient care | 1 day | 1 day | Same-day discharge | Same-day discharge |
| Return to activities | 1 week | 1 week | 1 week | 3 days |
| Duration | Permit | Permit | Adjustable and reversible | Temporary (4–12 months) |
| Important aspects | Greater type 2 diabetes remission and improvement in reflux | No bowel bypass • Reflux may appear or worsen | Reversible • Requires adjustments | Non-surgical • Endoscopic or via ingestible capsule |
Gastric bypass
- Ideal for
- BMI ≥35 with associated comorbidities or GORD
- Main objective
- Weight loss + metabolic control
- Average weight loss
- 32.8% TBWL
- Inpatient care
- 1 day
- Return to activities
- 1 week
- Duration
- Permit
- Important aspects
- Greater remission of type 2 diabetes • Improvement of GORD
Gastric sleeve
- Ideal for
- BMI ≥35 with associated conditions
- Main objective
- Weight loss + metabolic control
- Average weight loss
- 28.9% TBWL
- Inpatient care
- 1 day
- Return to activities
- 1 week
- Duration
- Permit
- Important aspects
- • No intestinal diversion • GORD may appear or worsen
Gastric band
- Ideal for
- Obesity with comorbidities
- Main objective
- Weight loss
- Average weight loss
- 17.3% TBWL
- Inpatient care
- Same-day discharge
- Return to activities
- 1 week
- Duration
- Adjustable and reversible
- Important aspects
- Reversible • Requires adjustments
Gastric balloon
- Ideal for
- BMI ≥27 with one comorbidity
- Main objective
- Weight loss and lifestyle change
- Average weight loss
- 15% TBWL (Spatz3 balloon)
- Inpatient care
- Same-day discharge
- Return to activities
- 3 days
- Duration
- Temporary (4–12 months)
- Important aspects
- Non-surgical • Endoscopic or via ingestible capsule
Ready to take the next step?
Speak with our bariatric surgery specialists.
Our patient results
Thousands of patients have trusted Dr Dick Manrique and his multidisciplinary team to transform their health, regain their confidence and improve their quality of life.
From the first appointment to post-bariatric care
His process goes beyond the procedure: comprehensive initial assessment and long-term multidisciplinary follow-up to sustain his progress and well-being
First appointment and assessment
Evaluate your case with Dr Dick Manrique's team to define your goals, clarify any questions and explore your treatment options
Personalised plan
Every patient is unique. We design a plan tailored to your health profile, lifestyle and long-term goals
Bariatric procedure
With an international career and reputation, Dr Dick Manrique performs his procedure with the utmost precision and safety
Continuous monitoring
Lasting results require follow-up; our team will support you after the procedure