A Double-Blind, Placebo Controlled, Randomized Trial to Assess the Impact of a Monthly Administration of 50,000 IU of Vitamin D3 for 6 Months on Serum Levels of 25-Hydroxyvitamin D in Healthy Young Adults

Table 1

Baseline demographic data of the healthy young Belgian volunteers who agreed to participate in the study. Continuous variables are expressed as mean ± SD.

	Total	Placebo group	Vitamin D group
SEX:
Male (n)	49	24	25
Female (n)	61	33	28
Age (years)	22.9 ± 2.5	23.0 ± 2.5	22.8 ± 2.6
BMI (kg/m²)	21.8 ± 2.1	21.9 ± 2.2	21.7 ± 2.0
25(OH)D (ng/mL)	22.0 ± 8.3	22.8 ± 8.5	21.2 ± 8.2
% subjects with 25(OH)D >30 ng/mL	12.7	14.0	11.3
% subjects with 25(OH)D between 20 and 30 ng/mL	48.2	49.1	47.2
% subjects with 25(OH)D between 12 and 19 ng/mL	28.2	26.3	30.2
% subjects with 25(OH)D <12 ng/mL	10.9	10.5	11.3
% subjects with 25(OH)D >60 ng/mL	0.9*	0	1.9*

∗One individual.