Vitamins & Nutrition

Weight loss surgery decreases the body’s ability to absorb vitamins and nutrients and/or restricts the amount of food you can consume. This can result in malnutrition, or vitamin and mineral deficiencies, that can be damaging to your health.

Vitamins and minerals are needed after surgery so the body can heal properly.  Note: We recommend taking a multivitamin twice daily for the rest of your life.

In addition to protein, you will also need the following vitamins post-op:

  • High Quality Chewable Multivitamin – Take two daily
  • B12 2500mcg Sublingual – Take one per week
    • Dissolve 1 tablet or drop (if using liquid product) under tongue daily, or a prescription for Nascobal (a once a week B12 nasal spray) can be called in for you.
  • Vitamin D3 5000IU daily
  • Vitamin B1 (Thiamine) – 50mg daily

Based on your lab results the nurse will inform you if you need to take:

  • Calcium Citrate Chewable ‐ 500mg – 1 three times daily for total of 1500mg daily.


  • Iron Chewable – 18mg (men and postmenopausal women) and 27‐45mg daily if premenopausal female. Note: All gastric bypass patients will need to consume at least 36 mg of iron daily.
  • Vitamin C Chewable – 500mg daily – Will need to take this if taking Iron, to help with absorption.

These are general guidelines. Please consult your doctor and/or dietitian for recommendations tailored to you.


We’ve partnered with top of line bariatric supplement companies to identify the highest quality bariatric vitamins and supplements to ensure patient success. We’ve selected options for patients to choose from to make it easy, affordable and set a standard vitamin / supplement regimen. For more information, click here.

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