Nutritional Deficiency After Stomach Bypass

Weight Loss Surgery Procedures - Research Into Gastric Reduction Surgery

Vitamin B12 Deficiency After Gastric Bypass Surgery

Approximately 37% of GBP patients develop B12 deficiency. Normally, gastric acid helps free B12 from the food source after which it binds to intrinsic factor in the duodenum and is later absorbed in the distalileum. These mechanisms are disrupted after gastric bypass surgery. Although low serum B12 levels may be common, few patients develop symptoms of the deficiency. Oral supplements containing 500 mcg of B12 improve deficiencies in 80% of patients. Researchers found normal absorption of free synthetic vitamin B12 in gastric bypass patients.

References:
Smith CD, Herkes S, Behrns K, et al. Gastric acid secretion andVitamin B12absorption after vertical Roux-en-Y gastric bypassfor morbid obesity. Ann Sur, 1993;218:91-96.
Brolin R, Gorman R, Milgrim L. Multivitamin prophylaxis inprevention of post-gastric bypass vitamin and mineral deficien-cies. Int J Obesity, 1991;15:661-667.
Brolin R, Gorman J, Gorman R, et al. Prophylactic iron supple-mentation after Roux-en-Y. Arch Surg, 1998;133:740-744.
Brolin R, Gorman J, Gorman R, et al. Are Vitamin B12and folatedeficiency clinically important after Roux-en-Y gastric bypass? J Gastointest Surg,
1998;2:436-442.
Brolin R, Leung M. Survey of vitamin and mineral supplementa-tion after gastric bypass and biliopancreatic diversion for morbidobesity. Obes Surg, 1999;9:150-154.
Rhode B, Arseneau P, Cooper B. Vitamin B12deficiency aftergastric surgery for obesity. Am J Clin Nutr, 1996;63:103-109.

Source:
University of Virgina. February 200444 Nutrition Issues In Gastroenterology, Series #14

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Laparoscopic or open bariatric surgery, such as gastric banding or bypass is not an easy solution to morbid obesity and weight loss. It is a serious surgical procedure, involving health risks. To produce lasting weight loss it requires a long-term patient commitment to eating a healthy diet and following a regular program of physical exercise. Life-long use of nutritional supplements may also be necessary. So, before deciding, discuss your options fully with your doctor. © 2003-2008 Bariatric-Surgery.Info - Terms - Contact - Information - Resources - Add URL