Table 3.

Mean (SD) vitamin B12 concentration in human milk from supplement users and nonsupplement users by time since birth in months (n = 170).

	Supplement users (n = 59)		Nonsupplement users (n = 111)		Total (n = 170)
Time since birth months	B12 milk pmol/L	MMA/Cr mmol/mol	B12 milk pmol/L	MMA/Cr mmol/mol	B12 milk pmol/L	MMA/Cr mmol/mol
1 (n = 21)	370 (208)	1.25 (0.63)	422 (251)	0.92 (0.28)	402 (231)	1.05 (0.46)
2 (n = 57)	308 (161)	0.95 (0.64)	337 (178)	0.98 (0.44)	327 (172)	0.97 (0.51)
3 (n = 25)	257 (76)	1.21 (0.52)	272 (114)	1.21 (0.58)	266 (99)	1.21 (0.54)
4 (n = 32)	390 (211)	0.95 (0.30)	275 (89)	1.34 (0.58)	333 (170)	1.16 (0.50)
5 (n = 14)	491 (313)	0.62 (0.22)	338 (226)	1.05 (0.55)	360 (232)	0.99 (0.54)
6 (n = 21)	367 (122)	0.98 (0.41)	279 (107)	1.04 (0.43)	299 (78)	1.10 (0.41)
Total	340 (179)	1.03 (0.52)	320 (169)	1.07 (0.49)	327 (172)	1.11 (0.49)