烟酸 · 单位换算
先选择标签注明的化学形式，再选择换算方向。未选择形式则不给出结果：同一 IU 数值在不同形式下对应的质量不同。
结果
请先选择形式。IU 不是质量单位，未确定形式即不存在可依据的系数。
本页使用的系数
| 形式 | 从 | 到 | 系数 | 来源 | 年份 |
|---|---|---|---|---|---|
| Niacinamide / nicotinamide (niacin) | mg | mg NE | 1 | FDA Guidance for Industry: Converting Units of Measure for Folate, Niacin, and Vitamins A, D, and E on the Nutrition and Supplement Facts Labels | 2019 |
| Nicotinic acid (niacin) | mg | mg NE | 1 | FDA Guidance for Industry: Converting Units of Measure for Folate, Niacin, and Vitamins A, D, and E on the Nutrition and Supplement Facts Labels | 2019 |
来源原文
1 mg NE = 1 mg niacin = 60 mg tryptophan (see § 101.9(c)(8)(iv) (footnote 5)). The term niacin refers to nicotinamide (nicotinic acid amide-NAD), nicotinic acid (pyridine-3-carboxylic acid), and derivatives that exhibit the biological activity of nicotinamide.
FDA Guidance for Industry: Converting Units of Measure for Folate, Niacin, and Vitamins A, D, and E on the Nutrition and Supplement Facts Labels
1 mg NE = 1 mg niacin = 60 mg tryptophan (see § 101.9(c)(8)(iv) (footnote 5)). The term niacin refers to nicotinamide (nicotinic acid amide-NAD), nicotinic acid (pyridine-3-carboxylic acid), and derivatives that exhibit the biological activity of nicotinamide.
FDA Guidance for Industry: Converting Units of Measure for Folate, Niacin, and Vitamins A, D, and E on the Nutrition and Supplement Facts Labels