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, as a general guideline to follow:

  • High Quality Chewable Multivitamin such as:
    • Bariatric Advantage Chewable Complete – Take 2 daily. Available at
    • Centrum Adult Chewable Tablet (not gummy) – take 2 daily
  • B12 2500mcg A Week – Can use any brand – 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.

  • B1 (THIAMINE) 50mg Daily

  • Calcium Citrate Chewable 500mg – 1 three times daily for total of 1500mg daily. Brand examples:
    • Upcal with D3 Unflavored Calcium Crystals – use 1 packet 3 times daily. Easily mixes with ReLaunch™ unflavored protein recipes. Available at
    • Bariatric Advantage 500mg chewable calcium tablets – take 1 three times daily
  • D3 5000IU Daily –  Can use any brand and can use capsules as they are small. 

  • 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. UNLESS YOUR IRON IS LOW ON THE BLOOD TEST, YOU DON’T NEED TO TAKE A SEPARATE IRON PILL AS IT IS ALREADY IN YOUR MULTIVITAMIN. DO NOT TAKE IRON AND CALCIUM AT THE SAME TIME. Brand example:
    • Bariatric Advantage Chewable Iron 

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

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