Gastric Sleeve

With Vertical Sleeve Gastrectomy (VSG), approximately 60% of the stomach is removed leaving the remaining portion of the stomach in a sleeve-like shape.

Nutrient deficiencies may arise due to:

  • Reduced stomach volume
  • Reduced dietary intake
  • Decreased capacity for digestion due to changes in stomach size
  • Reduced gastric acid (use of PPIs, and reduced volume)

Source: Aarts, Edo O, Ignace M, Janssen C, Berends FJ. The Gastric Sleeve: Losing Weight as Fast as Micronutrients? Obesity Surgery 21.2 (2011): 207–211. PMC. Web. 27 Feb. 2017.


Post Operative Bariatric Nutrition: Gastric Sleeve

Nutritional Deficiencies

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

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