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[Nutritional aspects of vitamin D]
1Kyoto Women's University, Department of Food and Nutrition.
Clinical Calcium
|July 4, 2006
Summary
Japan
Area of Science:
- Nutrition Science
- Public Health
Background:
- The 2005 Japanese Dietary Reference Intakes increased the adequate intake (AI) for vitamin D.
- This revision accounts for vitamin D insufficiency, not just deficiency.
Purpose of the Study:
- To evaluate the adequacy of the new vitamin D AI for the Japanese population.
- To consider if a separate AI for the elderly is necessary.
Main Methods:
- Analysis of the 2005 Japanese Dietary Reference Intakes guidelines.
- Comparison of Japanese vitamin D AI with international standards (USA, UK).
Main Results:
- The 2005 AI for vitamin D in Japan is 5 microg (200 IU), a rise from 100 IU.
- This value remains lower than recommendations in the USA and UK.
Conclusions:
- Further research is needed to confirm the adequacy of the current vitamin D AI.
- The potential need for age-specific vitamin D recommendations, particularly for the elderly, requires investigation.
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