Vitamin D is formed in the skin through exposure to UV light (~90%) or, to a lesser extent, absorbed with food (~10%). The two main metabolites are vitamin D3 (cholecalciferol), which is mainly formed in the skin or absorbed via animal products, and vitamin D2 (ergocalciferol), which is mainly found in plant foods.
A deficiency (hypovitaminosis D) with a serum concentration ≤20 ng/ml (50 nmol/l) is common worldwide and is caused by insufficient intake or too little exposure to sunlight. It is generally estimated that ~50% of the population is inadequately supplied. A low vitamin D level can favour the development of various diseases and can be treated by taking vitamin D.
Regular monitoring of vitamin D status, especially in people at increased risk of a deficiency, can enable early detection and help to prevent consequential damage to health.
Bestellnummer: FIA-1709
Literatur
Vitamin D status in healthy populations worldwide: a sys-tematic review protocol.
Dunlop E et al., JBI Evid Synth. 2023;10.11124/JBIES-22-00354. Prevalence of vitamin D deficiency and associated risk of all-cause and cause-specific mortality among middle-aged and older adults in the United States.
Wang TY et al., Front Nutr. 2023;10:1163737. doi:10.3389/fnut.2023.1163737