title: Vitamin D intake, sunlight exposure and 25-hydroxyvitamin D levels in the elderly during one year.
abstract: 3 groups of elderly people (65-80 years) were studied as regards their serum 25-hydroxyvitamin D (25-OH-D) concentrations, their dietary vitamin D intake and sunlight exposure during 1 year: group 1 (long-stay geriatric patients); group 2 (residents at an old people's home), and group 3 (elderly people living in their own homes). Young adults (30-50 years) served as controls. The 25-OH-D concentration in group 1 was significantly lower during the whole year than in any other group and the concentration in group 2 was significantly lower than in group 3 and the controls. The low 25-OH-D level in the long-stay geriatric patients and in the residents at the old people's home is a consequence of both a low dietary vitamin D intake and a low exposure to sunlight.
mesh_terms: D015652:25-Hydroxyvitamin D 2; D000328:Adult; D000368:Aged; D004032:Diet; D004872:Ergocalciferols / Q000031:analogs & derivatives* / Q000097:blood; D005260:Female; D006707:Homes for the Aged; D006801:Humans; D008297:Male; D008875:Middle Aged; D012111:Residence Characteristics; D012621:Seasons; D012648:Self Care; D013472:Sunlight; D013997:Time Factors; D014807:Vitamin D; D014808:Vitamin D Deficiency / Q000378:metabolism*
chemical_list: D004872:Ergocalciferols; D014807:Vitamin D; D015652:25-Hydroxyvitamin D 2