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
Copper

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.