title: [Vitamin D intake and blood 25-hydroxyvitamin D levels of adult Japanese].
abstract: This paper is a review of studies on the vitamin D nutritional status of adult Japanese. The average dietary intake of vitamin D by adult Japanese, according to the National Nutrition Survey, is 352 IU/day. Older people have a higher intake than the average value and younger people have a lower intake than the average. Epidemiologic studies using blood 25-hydroxyvitamin D (25 [OH] D) as an index of vitamin D nutritional status have shown that elderly people with low activities-of-daily-living levels and young women have lower 25 (OH) D levels and a higher prevalence of vitamin D insufficiency than the rest of the population. The vitamin D nutritional status of these two high-risk groups should be improved by increasing their vitamin D intake in food or by means of supplements.
authors.affiliation: Department of Community Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences.
authors.forename: Kazutoshi
authors.initials: K
authors.lastname: Nakamura
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D014807:Vitamin D / Q000008:administration & dosage* / Q000031:analogs & derivatives* / Q000097:blood
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D