Vitamin D2 and D3 supplementation in healthy adolescents from Ushuaia, Argentina

In order to improve vitamin D status of healthy adolescents from Ushuaia (55° S), three supplementations of 100,000IU of vitamin D2 (ergocalciferol) or vitamin D3 (cholecalciferol) were administered every three months: during fall (March), winter (June) and spring (September). Serum 25-hydroxyvitamin D (25OHD) was measured before the study, a month after the first supplementation, and two months after receiving the third supplementation (September 2008, April 2009 and November 2009). We studied 34 healthy adolescents, age (mean±SD) 18.5±2years old, 23 girls and 11 boys. None had received previous vitamin D. Seventeen adolescents received vitamin D2 and 17 received vitamin D3. Basal levels of serum 25OHD were 13.4±6.3ng/ml (range 4–26) in September/spring 2008 (D2 group: 14.6±6.4, D3...

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Vitamin,supplementation,healthy,adolescents,Ushuaia,Argentina