Table 1.

Serum 25 (OH)D, 1,25(OH)₂D and calcium levels after 5 weeks on vitamin D diets.

	D++	D+	D−	p-value D++ vs D+	p-value D+ vs D−
25(OH)D nmol/L	100.8 ± 4.6	41.2 ± 2.0	12.0 ± 4.0	<0.001	0.001
1,25(OH)2D pmol/L	119.9 ± 17.7	140.3 ± 26.3	85.6 ± 8.6	NS	NS
Calcium mmol/L	2.2 ± 0.04	2.3 ± 0.1	1.9 ± 0.1	NS	NS

Data are shown as mean ± SEM for n = 7–8 for 25(OH)D levels, n = 3–5/group for 1,25(OH)₂D, n = 4–5/group for calcium. P values reflect differences in mean between vitamin D groups calculated by independent student t-test. Results pooled from two independent experiments. NS = not significant.