Gastric bypass, also known as Roux-en-Y gastric bypass (RYGB) is the most common form of bariatric surgery performed where the stomach is divided into a small upper pouch and a much larger lower "remnant" pouch and then the small intestine is rearranged to connect to both.
Nutrient deficiencies may arise due to:
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.
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 | |
Magnesium | ||
Potassium | ||
Zinc | X | X |
Selenium | X | |
Copper | 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.