ASMBS suggested supplementation

On November 16, 2009, in General Nutrition, Vitamins, by Andrea

The American Society of Metabolic and Bariatric Surgeons has made a series of suggestions for postoperative vitamin supplementation prior to labs dictating otherwise.

- Adjustable Gastric Band/VSG: 100% of daily value
- RNY: 200% of daily value
- BPD/DS: 200% of daily value

  • Choose a multivitamin that is a high-potency vitamin containing 100% of daily value for at least 100% of daily value of 2/3 of nutrients
  • Begin with chewable or liquid
  • Progress to whole tablet/capsule as tolerated
  • Avoid time-released supplements
  • Avoid enteric coating
  • Choose a complete formula containing at least 18 mg iron, 400mcg folic acid, as well as selenium, and zinc in each serving
  • Avoid children’s formulas that are incomplete
  • May improve gastrointestinal tolerance when taken close to food intake
  • May separate dosage
  • Do not mix multivitamin containing iron with calcium supplement, take at least 2 hours apart
  • Individual brands should be reviewed for absorption rate and bioavailability
  • Specialized bariatric formulations are available

Additional cobalamin (B12)
- AGB/VSG: Not Applicable
- RNY: 350-500mcg if taken orally, 1000mcg / mo intramuscular injection

Additional elemental calcium
- AGB/VSG: 1500mg /day
- RNY: 1500-2000mg
- BPD/DS: 1800-2400mg

  • Choose a brand that contains calcium citrate and vitamin D3
  • Begin with chewable or liquid
  • Progress to whole tablet / capsule as tolerated
  • Split into 500-600 mg doses; be mindful of serving size on supplement label
  • Space doses evenly throughout day
  • Suggest a brand that contains magnesium, especially for BPD/DS
  • Do not combine calcium with iron containing supplements
  • Wait 2 or more hours after taking multivite or iron supplement to take
  • Wait 2 or more hours between doses
  • Promote intake of dairy beverages and/or foods that are significant sources of dietary calcium in addition to recommended supplements
  • Combined dietary and supplemental calcium intake greater than 1700 mg/day might be required to prevent bone loss during rapid weight loss

Additional elemental iron
- RNY: Minimum 18-27mg / day elemental
- BPD/DS: Minimum 18-27mg / day elemental

  • Recommended for menstruating women and those at risk of anemia
  • Begin with chewable or liquid
  • Progress to tablet as tolerated
  • Dosage may need to be adjusted based on biochemical markers
  • No enteric coating
  • Do not mix iron and calcium supplements, take at least 2 hours apart
  • Avoid excessive intake of tea due to tannin interaction
  • Encourage foods rich in heme iron
  • Vitamin C may enhance absorption of non-heme iron sources

Fat-soluble vitamins
- BPD/DS: 10,000 IU of vitamin A, 2000 IU of vitamin D, 300 mcg of vitamin K

  • With all procedures, higher maintenance doses may be required for those with a history of deficieincy
  • Water-soluble preparations of fat-soluble vitamins are available
  • Retinol sources of vitamin A should be used to calculate dosage
  • Most supplements contain a high percentage of beta carotene which does not contribute to vitamin A toxicity
  • Intake of 2000 IU vitamin D3 may be achieved with careful selection of multivitamin and calcium supplements
  • No toxic effect known for Vitamin K1, phytonadione (phyloquinone)
  • Vitamin K requirement varies with dietary sources and colonic production
  • Caution with vitamin K supplementation should be used for patients receiving coagulation therapy
  • Vitamin E deficiency is not prevalent in published studies

Optional B complex
- AGB / VSG: 1 per day
- RNY: 1 per day
- BPD/DS: 1 per day

  • B-50 dosage
  • Liquid form is available
  • Avoid time released tablets
  • No known risk of toxicity
  • May provide additional prophylaxis against B-vitamin deficiencies, including thiamin, especially for BPD/DS procedures as water-soluble vitamins are absorbed in the proximal jejunum
  • Note >1000mg of supplemental folic acid provided in combination with multivitamins could mask B12 deficiency
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4 Responses to “ASMBS suggested supplementation”

  1. MacMadame says:

    What exactly is an “Optional B-complex”? and B-50 dosage?

  2. Andrea says:

    One dose – one pill, one dropper, one *whatever*.

  3. Barb says:

    I take Centrum chewable but I only take 1 a day. Am I supposed to be taking 2 a day? I had RNY.

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