Adjustable Gastric Band

The Adjustable Gastric Band (AGB) is known as restrictive procedures as it restricts the capacity of the stomach. With the Adjustable Gastric Band (AGB), a band is laparoscopically placed around the upper part of the stomach and adjusted to make the stomach “smaller.” With the Gastric Balloon, a silicone balloon, placed inside the stomach, restricts stomach capacity. Although there may be less malabsorption issues with these restrictive procedures (compared with other bariatric procedures), there are still nutrient deficiency risks.

Nutrient deficiencies may arise due to:

  • Changes in dietary intake
  • Changes in food tolerance for key nutrient dense foods


Post Operative Bariatric Nutrition: Gastric Band

Nutritional Deficiencies

Pre and Post Bariatric Surgery/Procedure
Pre-Surgery Post-Surgery
Protein X X
Calcium   X
Vitamin A X X
Vitamin B1 (thiamin) X X
Vitamin B6 (pryidoxine) X X
Vitamin B12 (cobalamin) X X
Folate X X
Vitamin C X X
Vitamin E X  
Vitamin K    
Vitamin D X X
Iron   X
Zinc X  
Selenium X  

Nutritional deficiencies table shows deficiencies more commonly reported in research studies. For more information about deficiencies by procedure, and how these were identified, visit the resources section of Bariatric Advantage.