维生素每日摄取量计算器
使用此维生素每日摄取量计算器快速获得准确的计算结果。
% Daily Value
33.3 %
公式
## How to Calculate Vitamin Daily Value ### Formula **% DV = (Amount in Serving / Daily Value) x 100** ### Labeling Rules - 5% DV or less is considered LOW - 20% DV or more is considered HIGH ### Key Daily Values (Adults) - Vitamin C: 90 mg - Vitamin D: 20 mcg - Vitamin A: 900 mcg - Vitamin B12: 2.4 mcg
计算示例
An orange provides 30 mg of Vitamin C.
- 01% DV: (30 / 90) x 100 = 33.3%.
- 02Remaining: 90 - 30 = 60 mg to meet daily value.
- 03One orange provides about a third of daily Vitamin C.
常见问题
What does % Daily Value mean?
It shows how much of the recommended daily intake one serving of food provides. It is based on a 2000-calorie diet for adults.
Can I get too many vitamins from food?
It is very rare to get toxic levels of vitamins from food alone. Toxicity risk comes mainly from supplements, particularly fat-soluble vitamins (A, D, E, K).
Does cooking destroy vitamins?
Some vitamins are heat-sensitive (especially Vitamin C and B vitamins). Boiling causes vitamin loss into cooking water. Steaming and microwaving preserve more vitamins.
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