Supplementation is required to prevent a vitamin D deficiency for most people, since dietary sources of vitamin D tend to be inadequate,[1] and the amount of vitamin D produced in the skin through sun exposure can vary with geographical location[2] and individual skin pigmentation.[3]
References
- ^Whiting SJ, Green TJ, Calvo MSVitamin D intakes in North America and Asia-Pacific countries are not sufficient to prevent vitamin D insufficiency.J Steroid Biochem Mol Biol.(2007-Mar)
- ^Webb AR, Kline L, Holick MFInfluence of season and latitude on the cutaneous synthesis of vitamin D3: exposure to winter sunlight in Boston and Edmonton will not promote vitamin D3 synthesis in human skinJ Clin Endocrinol Metab.(1988 Aug)
- ^Coney P, Demers LM, Dodson WC, Kunselman AR, Ladson G, Legro RSDetermination of vitamin D in relation to body mass index and race in a defined population of black and white women.Int J Gynaecol Obstet.(2012-Oct)