666ug的维d是多少国际单位

① 维生素D的国际单位是什么

维生素D国际单位IU和mg之间换算档正：维生素D：40IU＝1ug。

维生素D3（胆钙化醇）由人体自身合成的，人体的皮肤含有一种胆固醇，经阳光照射后，就变成了维生素D3。所以，如果孩子能充分接受阳光直射皮肤4-6小时以上的话，自身合成的维生素D3，就基本上能满足。

(1)666ug的维d是多少国际单位扩展阅读：

维生素D3还可来自动物性食物，如肝类，尤其是由海产类的鱼肝中提炼的鱼肝油。维生素D3除存行握悔在于少数动物性食物之外。

主要为皮肤中的7-脱氢胆固醇经紫外线照射后形成的，而7-脱氢胆醇则是由胆固醇转变生成的，所以有人叫它太阳皮册维生素。

② 1ug等于多少单位维生素D

1ug等于多少单位维生素D？答案是稿谈：维生素D31ug=40IU国际标准：1IU维生素D=0.025ug维生素D3，维生素d3衍生物就是维生兄高素羡敬尺d3分子式中的氢原子或原子团被其他原子或原子团取代而衍生的相比较复杂的产物。它可以抑制细胞增殖，抑制人体的疾病，并且起抗炎作用。

③ 我想知道1微克维生素D等于多少国际单位

1微克维生素D等于0.025ug

国际单位IU与微克、毫克不是一个系统，没办法直接换算。需要先知道是哪种药品才能换算，对于不同的元素换算值不同（国际规定的）：

1、1IUVa=0.33μg

2、1IUβ-胡萝卜素=0.6μg

3、视黄醇当量（μg）=VA(μg)+0.167×β-胡萝卜素（μg）

4、1Ug Vd=40IU1IUVd=0.025μg

5、1IU维生素D=0.025ug维生素D3

6、1IU Ve=1mg DL-a-生育酚醋酸酯

7、1mgDL-a-生育酚=1.1IU Ve

8、1mgD-a-生育酚=1.49 IU Ve

9、1mgD-a-生育酚醋酸酯=1.36 IU Ve

(3)666ug的维d是多少国际单位扩展阅读：

1931年国际联盟卫生组织的维生素委员会，首先规定了各种维生素的国际单位；如每1个国际单位的维生素A相当于0.3微克，若是它的乙酸盐则为0.344微克，维生素D相当于0.025微克，维生素E相当于1毫克等等。

虽然许多维生素现今已改为重量表示，但维生素A和D仍然沿用国际单位，IU与微克、毫克不是一个系统，没办法换算，需要先知道是哪种药品才能换算。

④ 维生素的国际单位与重量如何换算

维生素A,它一个国际单位相当于维生素A乙酸盐0.344UG（微克）的生物效价.
换算如下：
维生素A：1 国际单位（IU） = 0.300μg 结晶视黄醇 = 0.344μg 维生素A醋酸酯 = 0.550μg 维生素A棕榈酸酯 = 0.358μg 维生素A丙酸酯 = 1 美国药典单位（USP）
注：维生素A、维生素D等,这些药物尚无纯品,如用重量单位表示,就不能反映出内在有效成分的真实含量,故改用相对计量方法以特殊“单位”表示该药的效价.一般以1mg为1个国际单位（IU）

不同的药物是各不相同的。如国际单位制导出的酶活性单位是mol/s，即每秒酶促反应转化的底物的量，如酶活性单位用国际单位(IU或U)者，可按1IU=1μmol/min或1IU(或U)=16.67nmol/s换算维生素A，它一个国际单位相当于维生素A乙酸盐0.344UG（微克）的生物效价。而这个生物效价，是以幼年鼠，喂以缺乏维生素A的食物，与喂以标准品的鼠的发育程度所比较，所得到的数据。维生素E有三种度量方法：国际单位（IU）、毫克（mg）和当量（RE）。换算关系为：1IU d-α-生育酚=1.49mgα-生育酚=1.49α-生育酚当量看到的另一种结果 400 IU的维生素E=267 mg的维生素E 也就是：1 IU的维生素E=0.668 mg的维生素E；1 mg的维生素E=1.5 IU的维生素E

⑤ 维生素当量及单位换算

一个国际单位相当于0.025微克的维生素D3，一微克的维生素D3有40国际单位.所以7.5微克的维生素d相当于300单位的维生素d。 1ug等于40单位的维生素d，7.5ug应该相当于300单位。我们每天维生素d的生理需要量，至少应该在400到600单位。

Vitamin A Technical Details:

Vitamin A is a fat-soluble vitamin. It is important for vision, bone growth and cell division.

Vitamin A consists of Retinol from animal sources, and Provitamin A Carotenoids from plant sources.

Retinol is referred to as pre-formed vitamin A. This means that it can be used directly by the body.

Provitamin A Carotenoids are Vitamin A precursors . This means that they are converted to Vitamin A by the body. However, conversion of the carotenoids is less efficient than that of retinol.

The Provitamin A Carotenoids are beta-carotene, alpha-carotene, beta-cryptoxanthin, lycopein, lutein and zeaxanthin (lutein and zeaxanthin are combined in the current database). The carotenoids are responsible for the red and yellow pigments of plants.

A unit called Retinol Activity Equivalents (RAE) is used to compare the Vitamin A activity of the different forms of Vitamin A. 1 µg (microgram) of retinol is equivalent to 1 µg RAE. However it takes 12 µg beta-carotene to equal 1 µg RAE, and 24 µg of the other carotenoids to equal 1 µg RAE. The following table summarizes the conversion of vitamin A values to RAE:

Historical Measures of Vitamin A

Previously, a unit called International Units (IU) was used to describe Vitamin A activity. However, at the time International Units for Vitamin A were defined (1989), it was thought that beta-carotene was half as concentrated as retinol (beta-carotene is now considered to be only 1/12 as concentrated as retinol).

Because of this, Vitamin A measurements expressed as IU tend to over-state the contribution of the provitamin A carotenoids. The following table summarizes the conversion of Vitamin A values to IU:

When it was determined that IU tended to overstate the contribution of the provitamin A carotenoids, a new unit called Retinol Equivalents (RE) was defined to describe the new values. At the time beta-carotene was thought to be 1/6 as concentrated as retinol. The following table describes the conversion of vitamin A values to RE:

In 2001, the National Academy of Sciences Institute of Medicine (NAS IOM) determined that Vitamin A activity from carotenoids is only half of what was previously believed. To account for this difference, and to avoid confusion, the new unit Retinol Activity Equivalents (RAE) was defined. Retinol Equivalents (RE) are no longer used.

The following table summarizes the relationship between the different measures:

IU Details

At the time of this writing (2004), the RDI (Reference Daily Intake) of Vitamin A is 5000 IU. However, IU is an inaccurate measure of vitamin A activity because it overstates the contributions of the provitamin A carotenoids (by a factor of 6). The FDA (US Food and Drug Administration) is considering changing the RDI to express it in terms of RAE.

Because the conversion of IU to RAE is different for retinol and the carotenoids, you cannot convert IU to RAE (or RAE to IU) for Total Vitamin A unless you know the proportion of retinol to carotenoids in the sample.

For example, knowing that you have 40 IU of Total Vitamin A is not enough information to determine how much retinol and carotenoids you have. 40 IU of Total Vitamin A can come from 12 µg RAE of retinol, or from 2 µg RAE of carotenoids, or from 6 µg RAE retinol plus 1 µg RAE carotenoids, or from many other combinations of retinol and carotenoids. The following table summarizes:

nutraCoster Details

Entering Retinol or Carotenoids Values

When you enter RAE for retinol or any of the carotenoids, nutraCoster automatically calculates the IU and %RDI values for the nutrient.

Finally, nutraCoster willrecalculate the IU and %RDI values of Total Vitamin A based on the new values for retinol and carotenoids.

Example: Suppose you have 80 µg RAE Total Vitamin A, which is composed of 60 µg RAE retinol and 20 µg RAE total carotenoids. The following table lists the values for the example:

Now change the Total Vitamin A RAE to 120 µg RAE. nutraCoster performs the following steps:

Total Vitamin A RAE was the sum of the retinol and carotenoids values, so nutraCoster increases retinol and carotenoids proportionally to 90µg RAE and 30 µg RAE.

The new value of 90 µg RAE for retinol converts to 300 IU and 6 %RDI.

The new value of 30 µg RAE for carotenoids converts to 600 IU and 12 %RDI.

Using the new IU and %RDI values, Total Vitamin A is now 900 IU and 18 %RDI.

The following table shows the results after the change:

nutraCoster performs a similar series of steps when you enter IU or %RDI values for Total Vitamin A.

CarotenoidDetails

When you enter or change a value for Total Carotenoids, nutraCoster checks to see if the Total Carotenoids value was equal to the sum of the indivial Provitamin A Carotenoids before the change. If it was, nutraCoster recalculates the indivial carotenoid values so the sum of the values equals the new Total Carotenoids value, while keeping the proportions the same.

When you enter or change a value for any of the indivial carotenoids, nutraCoster checks to see if the Total Carotenoids value was equal to the sum of the indivial Provitamin A Carotenoids before the change. If so, nutraCoster adjusts the Total Carotenoids value to equal the sum of the indivial carotenoid values after the change.

为了统一计量膳食中的维生素A，而提出的一个概念。其含义是包括视黄醇和β-胡萝卜素在内的具有维生素A活性物质所相当的视黄醇量。

由于人体 维生素A 来源于动物性食物的维生素A和植物性食物中的 胡萝卜素 （ 维生素A原 ），而维生素A的常用计量单位为国际单位（IU），胡萝卜素的常用计量单位为μg（微克）或者mg（毫克），为了统一计量膳食中的维生素A， FAO /WHO（1967）提出了视黄醇当量（Retinol Equivalent, RE)概念。其含义是包括视黄醇和 β-胡萝卜素 在内的具有维生素A活性物质所相当的视黄醇量。

视黄醇当量、 维生素A 、 β-胡萝卜素 的换算关系如下：

1μg β-胡萝卜素=0.167μg视黄醇当量（理论上1分子β-胡萝卜素能形成2分子维生素A，但因为 胡萝卜素 的吸收率为1/3，而吸收后转化为维生素A的 转化率 又只有1/2，所以，1μg的胡萝卜素只能折算为0.556IU维生素A，即0.167μg视黄醇当量。1IU维生素A=0.3μg视黄醇当量）

⑥ 维生素d36.0ug是多少国际单位

1440。
维生迟肢春素d的国际单位的换算关系为1国际单位=1IU=0.025ug，码耐所以维生素d的36.0ug是1400国际单位。
维生素D（简称VD）是一种脂溶性维生素，为一组具有抗佝偻病作用，结饥尘构类似的固醇类衍生物总称。