Effect of Meal Texture on Glucose-metabolism and Gut Hormone Response After Bariatric Surgery

Does Meal Texture Have Different Impact on Glucose Metabolism and Intestinal Hormone Response After Gastric Bypass and Sleeve Gastrectomy Operated Patients?

The investigators want to evaluate the difference in glucose metabolism and intestinal hormonal response after a liquid meal versus a solid meal in patients after bariatric surgery.

Inclusion Criteria:

• Age > 18 years
• RYGB or SG operation > 12 months prior to inclusion
• Weight stable (± 3 kg during the last month)
• HbA1c < 48 mmol/mol before surgery, and no history of diabetes
• HbA1c < 48 mmol/mol and fasting plasma glucose < 6.1 mmol/l at inclusion

Exclusion Criteria:

• Thyrotoxicosis or inadequately treated hypothyreosis
• Hemoglobin < 6.5 mmol/l at inclusion
• Pregnancy or breast feeding
• Medication affecting the planned examinations