Table 4.

Serum concentrations of vitamin D metabolites in control (n 6) and treatment (n 7) groups as measured by HPLC at the conclusion of the vitamin D supplementation trial

(Mean values and standard deviations)

	Group
	Control		Treatment*
Vitamin D metabolite	Mean	sd	Mean	sd
25(OH)D3 (ng/ml)	40·4	9·9	47·8	6·4
25(OH)D2 (ng/ml)	ND		ND
24R,25(OH)2D3 (ng/ml)	17·7	6	18·5	3·7

25(OH)D₃, 25-hydroxyvitamin D₃; 25(OH)D₂, 25-hydroxyvitamin D₂; ND, not detected (<1·0 ng/ml); 24R,25(OH)₂D₃, 24R, 25-dihydroxyvitamin D₃.

^*Daily oral vitamin D₃ supplementation, 2·3 µg/kg^0·75.