Winter 25-hydroxyvitamin D levels in young urban adults are affected by smoking, body mass index and educational level

Shinkov A, Borissova A-M, Dakovska L, Vlahov J, Kassabova L, Svinarov D. Winter 25-hydroxyvitamin D levels in young urban adults are affected by smoking, body mass index and educational level. Eur J Clin Nutr. 2015; 69(3): 355–60.