title: Vitamin D, aging, and the 2005 Dietary Guidelines for Americans.
abstract: The 2005 Dietary Guidelines for Americans recommend that older adults, people with dark skin, and those exposed to insufficient ultraviolet radiation (i.e., sunlight) consume extra vitamin D from vitamin D-fortified foods and/or supplements. Individuals in these high-risk groups should consume 25 microg (1000 IU) of vitamin D daily to maintain adequate blood concentrations of 25-hydroxyvitamin D, the biomarker for vitamin D status. This review considers recommendations for vitamin D-rich foods and dietary supplements, as well as specific problems with self-prescribing sun exposure or artificial sources of ultraviolet radiation to meet the vitamin D recommendations for older people.
authors.affiliation: Department of Foods and Nutrition, Dawson Hall, Bldg. 1010, University of Georgia, Athens, GA 30602-3622, USA. mjohnson@fcs.uga.edu
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Johnson
authors.forename: Michael G
authors.initials: MG
authors.lastname: Kimlin
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D019587:Dietary Supplements; D005527:Food, Fortified; D006801:Humans; D018673:Nutrition Policy; D009751:Nutritional Requirements; D012307:Risk Factors; D012880:Skin Pigmentation; D014466:Ultraviolet Rays; D014481:United States; D014807:Vitamin D / Q000008:administration & dosage*; D014808:Vitamin D Deficiency / Q000453:epidemiology / Q000517:prevention & control*
chemical_list: D014807:Vitamin D