Circulating 25-Hydroxyvitamin D Levels in Fully Breastfed Infants on Oral Vitamin D Supplementation

Table 2

Circulating 25(OH)D (ng/mL) at visits 1, 4, and 7 by season. Sunny months at latitude 32^∘N based on ultraviolet light indices occur from April through October. Relative nonsunny months comparatively occur from November through March.

	25(OH)D (ng/mL)	25(OH)D (ng/mL)	25(OH)D (ng/mL)
	Visit 1	Visit 4	Visit 7
Sunny months	18.5	46.0	48.0
Nonsunny months	13.2	42.1	37.3