Table 3.

Guidelines and recommendations of elemental iron supplementation

Guideline	Prophylaxis of iron deficiency	Treatment of iron deficiency
IFSO-EC/EASO [13]	No exact recommendation
AACE/TOS/ASMBS/OMA/ASA [14]	45 - 60 mg iron/day	150–200 mg iron up to 2–3 times/day
BOMSS [15]	45–60 mg iron/day Menstruating women: 100 mg/day
Endocrine Society [16]	--	60 mg iron 2–3 times/day + vitamin C

IFSO-EC International Federation for the Surgery of Obesity and Metabolic Disorders – European Chapter, EASO European Association for the Study of Obesity, AACO American Association of Clinical Endocrinologists, TOS The Obesity Society, ASMBS American Society for Metabolic & Bariatric Surgery, OMA Obesity Medicine Association, ASA American Society of Anesthesiologists, BOMSS British Obesity and Metabolic Surgery Society