Editorial review: Bari Liquid Force Editorial Team. This page was revised for topic accuracy and checked against the specifically named sources below. No individual clinician or firsthand clinical experience is claimed.
Direct answer: One-anastomosis gastric bypass combines restriction with intestinal bypass. Supplementation and monitoring should reflect the bypass length, symptoms, protein intake, and the operating program's protocol.
Questions specific to OAGB
- Ask which RYGB or more intensive targets the program uses for the individual anatomy.
- Monitor protein status and fat-soluble vitamins when malabsorption is greater.
- Include calcium, iron, B12, vitamin D, thiamine, folate, zinc, and copper in the reconciliation.
- Report persistent diarrhea, vomiting, rapid weakness, or edema promptly.
What to do next
Published guidance is less uniform for OAGB than for older procedures, so the surgeon and bariatric dietitian should document the exact plan.
For procedure-specific supplement amounts, use the ASMBS guideline summary and compare the complete regimen with the plan from the bariatric surgeon or registered dietitian.