Duodenal Switch

The Duodenal Switch procedure (DS, BPD/DS) reduces stomach size, reroutes the intestines, and removes the gallbladder.

Nutrient deficiencies may arise due to:

  • Significant malabsorption
  • 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: Xanthakos, Stavra A. “Nutritional Deficiencies in Obesity and After Bariatric Surgery.” Pediatric clinics of North America 56.5 (2009): 1105–1121. PMC. Web. 25 Feb. 2017.


    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  
    Folate X X
    Vitamin C X X
    Vitamin E X X
    Vitamin K   X
    Vitamin D X X
    Iron   X
    Magnesium   X
    Potassium   X
    Zinc X X
    Selenium X 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.