Table 2.

Micronutrient requirements after SG and RYGB by the American Association of Clinical Endocrinologists/American College of Endocrinology, The Obesity Society and American Society for Metabolic and Bariatric Surgery (AACE-TOS-ASMBS) [11]

Micronutrient	Doses and recommendations
Thiamine (Vitamin B1)	Minimum: > 12 mg/d Recommendation: 50–100 mg/d From a multivitamin or B-complex supplement
Calcium	1,200 to 1,500 mg/d It should be given in divided doses Calcium carbonate should be taken with meals Calcium citrate can be taken with or without meals
Vitamin D	1,200–1,500 mg/d Dose should be based on circulating vitamin D concentration
Iron	45–60 mg/d of elemental iron From a multivitamin and mineral supplement
Vitamin B12	Orally: 350–1,000 µg/d Parenteral: 1,000 µg monthly
Folate	General recommendation: 400–800 µg/d Women of childbearing age: 800–1,000 µg/d
Vitamin A	5,000–10,000 IU/d Increased dose in patients with history of deficiency
Vitamin K	90–120 µg/d Increased dose in patients with history of deficiency
Vitamin E	15 mg/d Increased dose in patients with history of deficiency
Zinc	RYGB: 8–22 mg/d SG: 8–11 mg/d