International Journal of Endocrinology / 2013 / Article / Tab 3

Clinical Study

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 3

Percentage of patients whose 25(OH)D levels were found in the <12, 20–30, and >30 ng/mL groups in the vitamin D or placebo group. One patient presented a 25(OH)D level >60 ng/mL in October and another one in May.

Distribution of 25(OH)D serum levels
In volunteers receiving vitamin D
Monthly doses of 50,000 IU of cholecalciferol
In volunteers receiving the placebo
25-OH-Vit DBaselineAfter 90 daysAfter 180 daysBaselineAfter 90 daysAfter 180 days

<12 ng/mL11.3%0%0%10.5%42.1%5.3%
12–19 ng/mL30.2%7.6%3.8%26.3%42.1%28.1%
20–29 ng/mL47.2%50.9%26.4%49.1%12.3%50.9%
≥30 ng/mL11.3%41.5%69.8%14.0%3.5%15.8%

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