Table A1.

Additional information describing supplementation regimens for each study cited above.

Article #	Authors	Iron and Ferritin	B12	Folate	Vitamin D
1	Hakeam et al.	All patients who received omeprazole postop developed iron deficiency.	Patients with preop B12 deficiency given 1000 mcg intramuscular injection 1 day postop. 6 months postop, 6 patients received 1000 mcg IM for two months. 9 of 16 patients who developed B12 deficiency used omeprazole for at least 6 months postop.	0.2 mg folic acid, 12 mcg cyanocobalamin. No notes on compliance
2	Gehrer et al.	100% of iron deficiency treated with IV injection of iron-III-hydroxide	Postop, 80% of B12 deficiency successfully treated with IM.		100% of Vitamin D deficiency treated with 300,000 IE of oily suspension cholecalciferol. Secondary hyperparathyroidism treated with normal Vitamin D supplementation.
3	Aarts et al.				Multivitamin 3× daily. No notes on compliance.
4	Ruiz-Tovar et al.				Multivitamin daily. No notes on compliance.
5	Kehagias et al.		B12 supplement IM 1000–3000 if deficient preop.
6	Damms-Machad et al.		11% B12 injections		Vitamin D supplementation was protective for Vit D deficiency.
7	Moize et al.	160 mg of iron.	1000 mcg B12 IM monthly		880 IU Vitamin D.
8	Saif et al.	Iron + 1200 mg calcium citrate. No significant difference noted in Iron deficiencies based on supplementation compliance.			Vitamin D additionally prescribed based on need. No significant difference noted in Vitamin D deficiency based on supplementation compliance.
9	Capoccia et al.
10	Eltweri et al.				Vitamin D daily. No notes on compliance.
11	Gjessing et al.				Vitamin D 10 mcg/day. No notes on compliance.
12	Belfiore et al.	Patients with iron deficiency given 329.7 mg ferrous sulfate.	Vitamin B12 deficiency treated orally or by 1000 mcg IM. Folate deficiency treated with 105 mg folate daily for 3 months.	Patients with folate deficiency given 20 mg folate.
13	Ben-Porat et al.	Iron deficiency treated with 200 mg iron supplementation daily.		Folate deficiency treated with 105 mg folate daily for 3 months.	400 IU Vitamin D and 500 mg Calcium. No notes on compliance.
14	Lanzarini al.				16,000 IU calcifediol for patients with deficiency in intervention group. No notes on compliance. Intervention groups compared.
15	Al-Mulhim				Multivitamin daily. No notes on compliance.
16	Gillon et al.		B12 supplementation based on deficiency. Compliance well documented.	Folic acid supplementation based on deficiency. Compliance well documented.	Vitamin D supplementation based on deficiency. Compliance well documented.
17	Zarshenas et al.	Deficiencies corrected as needed.			1200 mg calcium daily. No notes on compliance. 50,000 IU prescribed for patients with preop Vitamin D deficiency. Other deficiencies corrected as needed.