Gastric Sleeve Vitamin Guides

Gastric sleeve surgery reduces your stomach to about 15-20% of its original size, which affects how you absorb key nutrients, especially iron, vitamin B12, and vitamin D. These guides are written by David Gans, a bariatric patient and founder of SleeveVitamins.com, to help you understand exactly what your body needs after sleeve surgery.

Each guide is based on ASMBS guidelines for sleeve patients: at least 18mg of elemental iron daily, 1,000mcg of vitamin B12, calcium citrate in split doses, and a once-daily bariatric multivitamin. Sleeve patients need different supplements than bypass patients, and these guides explain exactly why and what to look for.

All products are compared by price per day based on a 90-day supply. All guides are reviewed regularly to reflect current ASMBS recommendations.