Study population & location	25(OH) D (ng/mL) mean (SD)	Vitamin D status			Reference
Study population & location	25(OH) D (ng/mL) mean (SD)	% Deficient	% Insufficient	% Sufficient	Reference
N = 35 Infants, 3 months old.	18.19 ± 9.74	80%^#	-	-	Bhalala U. et al. [19] (2007)
N = 180 Healthy lactating mothers.	10.88 ± 5.8	47.8%*	-	-	Seth A. et al. [28] (2009)
N = 180 Exclusively breast fed infants, 2 - 24 week old.	11.6 ± 8.3	43.2%*	-	-	Seth A. et al. [28] (2009)
N = 60 Lactating mothers, age 25.0 (2.0) yrs.	9.06 ± 4.78	98.3%	-	-	Mehrota P. et al. [29] (2010)
N = 60 Breastfed infants, age 3.0 (0.14) months.	9.03 ± 4.63	100%	-	-	Mehrota P. et al. [29] (2010)
N = 97 Lactating mothers.	9.85 ± 6.28	-	-	-	Agarwal N. et al. [30] (2010)
N = 97 Exclusively breastfed infants.	12.59 ± 8.37	-	-	-	Agarwal N. et al. [30] (2010)
N = 98 Lactating mothers, Delhi, age 23.3 (3.3) yrs.	Median 9.8 (5.0 - 13.8)	92.6%	-	-	Jain V. et al. [31] (2011)
N = 98 Breastfed Infants, 58.2% male, age 13.6 (2.2) weeks.	Median 10.1 (2.5 - 17.1)	86.5%	-	-	Jain V. et al. [31] (2011)
N = 342 Lactating mothers, 6 - 8 weeks postpartum.	7.84 ± 3.32	99.7%	-	-	Marwaha R.K. et al. [23] (2011)
N = 342 Exclusively breastfed infants.	8.92 ± 4.2	98.8%	-	-	Marwaha R.K. et al. [23] (2011)