一般的に知られていること

一般的に知られていること: Vitamin A is a fat-soluble vitamin the body uses for normal vision, skin, cell growth, and its defense system; plant foods supply carotenoids such as beta-carotene that the body converts to it.
摂取が少ないとき: Low vitamin A status is commonly discussed in relation to poor night vision and dry eyes, and is rare where diets are varied.
摂取が多いとき: Very high preformed vitamin A from supplements or liver is commonly discussed in relation to headaches and, over time, liver strain, and is a particular point of caution during pregnancy; the commonly cited upper intake level for adults is 3,000 mcg a day. Beta-carotene from plants does not carry the same reports.

参考摂取量

一般的な成人向けの参考値です。あなた個人の目標値でも、必要性の主張でもありません。

知っておきたいこと

Preformed vitamin A is fat-soluble and can build up; very high supplemental amounts are a topic of caution, especially during pregnancy.