Micronutrient deficiencies and bariatric surgery

Robert F Kushner*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

34 Scopus citations


PURPOSE OF REVIEW: Bariatric surgery is associated with the development of several micronutrient deficiencies that are predictable, preventable and treatable based on the surgically altered anatomy and imposed dietary changes. With an increasing number of severely obese patients undergoing bariatric surgery, clinicians need to become familiar with the surgical procedures and associated nutritional deficiencies. This article will review the pathophysiology, clinical presentation, screening tests, and treatment for selected micronutrient deficiencies. RECENT FINDINGS: The three restrictive malabsorptive procedures - Roux-en-Y gastric bypass, biliopancreatic diversion and biliopancreatic diversion with duodenal switch - pose a greater risk for micronutrient malabsorption and deficiency than the purely restrictive laparoscopic adjustable silicone gastric banding. Although other micronutrients have been reported, the metabolic and clinical deficiencies of two minerals (iron and calcium) and four vitamins (thiamine, folate, vitamin B12 and vitamin D) have been most frequently described in the literature. Subclinical and clinical presentation of deficiencies can occur from weeks to years following the surgical procedures. Metabolic bone disease is the most concerning long-term nutritional complication. SUMMARY: All patients undergoing restrictive-malabsorptive procedures must be evaluated for development of micronutrient deficiencies. With careful monitoring and adequate supplementation, these deficiencies are largely avoidable and treatable.

Original languageEnglish (US)
Pages (from-to)405-411
Number of pages7
JournalCurrent Opinion in Endocrinology and Diabetes
Issue number5
StatePublished - Oct 1 2006


  • Bariatric surgery
  • Hypovitaminosis D
  • Iron deficiency anemia
  • Metabolic bone disease
  • Micronutrient deficiency
  • Obesity

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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