B12 Doses and Absorption

	B	C	D	E	F	G	H	I	J	K
1
2	See Vitamin B12: Rationale for Recommendations for an explanation of this spreadsheet.
3
4		Recommendations		Regimens to Meet the Recommendations
5				(IOM–EFSA)
6		IOM	EFSA	3x day	2x day	1x day	3x week	2x week	1x week
7	Age	µg	µg	µg	µg	µg	µg	µg	µg
8	6 months	0.4	None	0.2	0.2	0.4
9	7-11 mos	0.5	1.5	0.2–0.5	0.3–1.0	0.5–10
10	1-3 yrs	0.9	1.5	0.3–0.5	0.5–1.0	0.9–10
11	4-6 yrs	1.1	1.5	0.4–0.5	0.6–1.0	1.4–10	100–500	500–1000	1000–2500
12	7-8 yrs	1.2	2.0	0.4–0.7	0.6–1.4	1.5–50	100–500	500–1000	1000–2500
13	9-10 yrs	1.5	2.5	0.5–0.8	0.8–1.8	2–50	250–500	500–1000	1000–2500
14	11-13 yrs	1.8	3.0	0.6–1.0	0.9–2	5–50	250–500	500–1000	1000–2500
15	14 yrs	2.4	3.5	0.8–1.2	1.2–5	5–100	250–1000	500–1000	1250–2500
16	≥15 yrs	2.4	4.0	0.8–1.3	1.2–5	5–100	250–1000	500–1250	1250–2500
17	Pregnant	2.6	4.5	0.9–1.5	1.3–5	10–250
18	Breastfeeding	2.8	5.0	1.0–1.7	1.4–5	10–250
19
20	IOM	RDA		Divided by 3 meals	Divided by 2 meals		Per Week	Absorbed per meal (50%)
21	6 months	0.4		0.13	0.20		1.40	0.07
22	7-11 mos	0.5		0.17	0.25		1.75	0.08
23	1-3 yrs	0.9		0.30	0.45		3.2	0.15
24	4-6 yrs	1.1		0.37	0.55		3.9	0.18
25	7-8 yrs	1.2		0.40	0.60		4.2	0.20
26	9-10 yrs	1.5		0.50	0.75		5.3	0.25
27	11-13 yrs	1.8		0.60	0.90		6.3	0.30
28	14 yrs	2.4		0.80	1.20		8.4	0.40
29	≥15 yrs	2.4		0.80	1.20		8.4	0.40
30	Pregnant	2.6		0.87	1.30		9.1	0.43
31	Breastfeeding	2.8		0.93	1.40		9.8	0.47
32
33	EFSA	AI		Divided by 3 meals	Divided by 2 meals	Per day	Per Week	Absorbed per meal (Walsh)
34	6 months
35	7-11 mos	1.5		0.50	0.75		6.6	0.31
36	1-3 yrs	1.5		0.50	0.75		6.6	0.31
37	4-6 yrs	1.5		0.50	0.75		6.6	0.31
38	7-8 yrs	2		0.67	1.00		8.2	0.39
39	9-10 yrs	2.5		0.83	1.25		10.1	0.48
40	11-13 yrs	3		1.00	1.50		12.0	0.57
41	14 yrs	3.5		1.17	1.75		13.7	0.65
42	≥15 yrs	4.0		1.33	2.00	2.12	14.9	0.71
43	Pregnant	4.5		1.50		2.32	16.3
44	Breastfeeding	5.0		1.67		2.52	17.7
45
46		S	K	P (passive)	Mid-point	7	Rounding Amounts		Rounding Thresholds
47	6 months	1.00	1.10	0.0030		14	0.5	1250	Fortified Foods	Supplements
48	7-11 mos	1.00	1.10	0.0030			1	1500	(µg)	%
49	1-3 yrs	1.00	1.10	0.0030			2	2500	1.85	110%
50	4-6 yrs	1.00	1.10	0.0030			5	3000
51	7-8 yrs	1.10	1.21	0.0033	8.0	0.143	10
52	9-10 yrs	1.30	1.44	0.0039	10.0	0.429	25
53	11-13 yrs	1.55	1.73	0.0046	12.5	0.786	50
54	14 yrs	1.70	1.90	0.0050			100
55	≥15 yrs	1.70	1.90	0.0050			250
56	Pregnant	1.70	1.90	0.0050			500
57	Breastfeeding	1.70	1.90	0.0050			1000
58
59	IOM	Required Amount		3x per day	2x per day	1x per day	3x per week	2x per week	1x per week
60	doses/week			21	14	7	3	2	1
61
62	6 months			0.08	0.12	0.27
63	7-11 mos			0.10	0.16	0.36
64	1-3 yrs			0.19	0.32	0.89
65	4-6 yrs			0.25	0.41	1.32	98	310	950
66	7-8 yrs			0.27	0.45	1.43	96	306	944
67	9-10 yrs			0.34	0.58	1.92	121	345	1,025
68	11-13 yrs			0.41	0.70	2.33	125	352	1,040
69	14 yrs			0.58	1.02	4.3	223	501	1,340
70	≥15 yrs			0.58	1.02	4.3	223	501	1,340
71	Pregnant			0.64	1.16	5.6	269	571	1,480
72	Breastfeeding			0.71	1.31	7.6	315	641	1,620
73
74	EFSA	Required Amount		3x per day	2x per day	1x per day	3x per week	2x per week	1x per week
75	doses/week			21	14	7	3	2	1
76	6 months
77	7-11 mos			0.50	0.97	11.0
78	1-3 yrs			0.50	0.97	11.0
79	4-6 yrs			0.50	0.97	11.0	400	766	1,865
80	7-8 yrs			0.67	1.37	34.6	501	919	2,171
81	9-10 yrs			0.83	1.75	45.9	533	968	2,272
82	11-13 yrs			1.00	2.10	48	539	977	2,292
83	14 yrs			1.17	2.50	62	575	1,031	2,401
84	≥15 yrs			1.33	3.04	92	652	1,147	2,633
85	Pregnant			1.50	3.89	130	745	1,287	2,913
86	Breastfeeding			1.67	5.06	168	838	1,427	3,193
87
88	IOM	Required Amount Rounded		3x per day	2x per day	1x per day	3x per week	2x per week	1x per week
89	6 months			0.2	0.2	0.4
90	7-11 mos			0.2	0.3	0.5
91	1-3 yrs			0.3	0.5	0.9
92	4-6 yrs			0.4	0.6	1.4	100	500	1000
93	7-8 yrs			0.4	0.6	1.5	100	500	1000
94	9-10 yrs			0.5	0.8	2.0	250	500	1000
95	11-13 yrs			0.6	0.9	5	250	500	1000
96	14 yrs			0.8	1.2	5	250	500	1250
97	≥15 yrs			0.8	1.2	5	250	500	1250
98	Pregnant			0.9	1.3	10	250	1000	1500
99	Breastfeeding			1.0	1.4	10	500	1000	1500
100