Bariatric surgery requires lifelong adherence to behavior modification including mineral and vitamin supplementation. While some weight loss procedures pose a greater risk of nutritional deficiencies postoperatively than others, none provide 100% immunity. Decreased portion sizes, difficulty tolerating certain foods and food groups, and malabsorption are the main reasons for vitamin-mineral supplementation. The following are the most current vitamin and mineral recommendations from the American Society for Metabolic and Bariatric Surgery following weight loss procedures.