Vitamin D, aging, and the 2005 Dietary Guidelines for Americans |
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Authors: | Johnson Mary Ann Kimlin Michael G |
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Affiliation: | Department of Foods and Nutrition, Dawson Hall, Bldg. 1010, University of Georgia, Athens, GA 30602-3622, USA. mjohnson@fcs.uga.edu |
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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. |
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Keywords: | aging Dietary Guidelines for Americans older adults sunlight supplements vitamin D |
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