ビタミンCの摂取基準と推奨事項
M Levine1, S C Rumsey, R Daruwala
1Molecular and Clinical Nutrition Section, Digestive Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.
JAMA
|April 27, 1999
まとめ
新規のビタミンC摂取推奨では,推奨摂取量 (RDA) は1日120mgで,果物と野菜の5食分が充足摂取量 (AI) を提供することを推奨しています. 1日1グラム以上の摂取は健康に危険をもたらす可能性があります.
科学分野:
- 栄養科学 栄養学 栄養科学は,栄養学が,栄養学が,栄養学が,栄養学が,栄養学が,栄養学が,栄養学が,栄養学が,栄養学が,栄養学が,栄養学は,栄養学が,栄養学は,栄養学は,栄養学は,栄養学は,栄養学は,栄養学は,栄養学は,栄養学は,栄養学は,栄養学は
- バイオケミストリー バイオケミストリー
- 公衆衛生は公衆衛生である.
背景:
- 食品・栄養委員会 (Food and Nutrition Board) は,ビタミンCの摂取推奨量を改定し,1989年の推奨摂取量 (RDA) 60mgを更新しています.
- 生化学的,分子的,疫学的,および臨床研究からの広範な新しいデータが検討のために利用可能です.
- 改訂プロセスは,さまざまな健康上のアウトカムに対する食事による可用性,生物可用性,および用量反応関係を含む9つの主要な基準を考慮しています.
研究 の 目的:
- ビタミンCのための新しい食事基準摂取量 (DRI) を開発するために,既定の基準を適用する.
- 推定平均需要 (EAR),RDA,適切な摂取量 (AI),許容可能な上限摂取量 (UL) を含む更新された基準値を提案する.
- 医療従事者や一般市民に,最適なビタミンC摂取量に関する,根拠に基づいたガイドラインを提供すること.
主な方法:
- 9つの特定の基準に基づいて,利用可能な科学的データの評価.
- ビタミンCの推定平均需要 (EAR) の計算
- EARおよびその他の基準に基づいてRDA,AI,および許容可能な上限摂取量 (UL) の決定.
主要な成果:
- ビタミンCの提案されたEARは100mg/日であり,提案されたRDAは120mg/日です.
- 十分な摂取量 (AI) は,果物と野菜の5食分から200mg/日,または不足を防ぐために100mg/日と設定されています.
- 提案されている許容可能な上限摂取量 (UL) は,ビタミンCの1グラム (1000 mg) 以下です.
結論:
- 果物と野菜を1日5回摂取することは,がん予防と健康な個人に十分なビタミンCの摂取を支える可能性があります.
- 1グラム以上のビタミンCを毎日摂取すると,一部の個人に有害な副作用が起こる可能性があります.
- 提案されたDRIは,ビタミンCの栄養に関する最新で証拠に基づいたガイドラインを提供します.
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