title: The decline in vitamin D status with age.
abstract: A cross-sectional study of plasma 25-hydroxy-vitamin D (250HD) concentrations in healthy women in the age range 20-96 years is reported. Mean values decline with increasing age while abnormally low levels of plasma 250HD are more common in the elderly. The decline in vitamin D status with age is probably the result of lack of sunlight exposure associated with social factors and physical immobility.
mesh_terms: D015652:25-Hydroxyvitamin D 2; D000328:Adult; D000368:Aged; D000375:Aging; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006887:Hydroxycholecalciferols / Q000097:blood*; D008875:Middle Aged
chemical_list: D006887:Hydroxycholecalciferols; D015652:25-Hydroxyvitamin D 2