666ug的維d是多少國際單位

① 維生素D的國際單位是什麼

維生素D國際單位IU和mg之間換算檔正：維生素D：40IU＝1ug。

維生素D3（膽鈣化醇）由人體自身合成的，人體的皮膚含有一種膽固醇，經陽光照射後，就變成了維生素D3。所以，如果孩子能充分接受陽光直射皮膚4-6小時以上的話，自身合成的維生素D3，就基本上能滿足。

(1)666ug的維d是多少國際單位擴展閱讀：

維生素D3還可來自動物性食物，如肝類，尤其是由海產類的魚肝中提煉的魚肝油。維生素D3除存行握悔在於少數動物性食物之外。

主要為皮膚中的7-脫氫膽固醇經紫外線照射後形成的，而7-脫氫膽醇則是由膽固醇轉變生成的，所以有人叫它太陽皮冊維生素。

② 1ug等於多少單位維生素D

1ug等於多少單位維生素D？答案是稿談：維生素D31ug=40IU國際標准：1IU維生素D=0.025ug維生素D3，維生素d3衍生物就是維生兄高素羨敬尺d3分子式中的氫原子或原子團被其他原子或原子團取代而衍生的相比較復雜的產物。它可以抑制細胞增殖，抑制人體的疾病，並且起抗炎作用。

③ 我想知道1微克維生素D等於多少國際單位

1微克維生素D等於0.025ug

國際單位IU與微克、毫克不是一個系統，沒辦法直接換算。需要先知道是哪種葯品才能換算，對於不同的元素換算值不同（國際規定的）：

1、1IUVa=0.33μg

2、1IUβ-胡蘿卜素=0.6μg

3、視黃醇當量（μg）=VA(μg)+0.167×β-胡蘿卜素（μg）

4、1Ug Vd=40IU1IUVd=0.025μg

5、1IU維生素D=0.025ug維生素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的維d是多少國際單位擴展閱讀：

1931年國際聯盟衛生組織的維生素委員會，首先規定了各種維生素的國際單位；如每1個國際單位的維生素A相當於0.3微克，若是它的乙酸鹽則為0.344微克，維生素D相當於0.025微克，維生素E相當於1毫克等等。

雖然許多維生素現今已改為重量表示，但維生素A和D仍然沿用國際單位，IU與微克、毫克不是一個系統，沒辦法換算，需要先知道是哪種葯品才能換算。

④ 維生素的國際單位與重量如何換算

維生素A,它一個國際單位相當於維生素A乙酸鹽0.344UG（微克）的生物效價.
換算如下：
維生素A：1 國際單位（IU） = 0.300μg 結晶視黃醇 = 0.344μg 維生素A醋酸酯 = 0.550μg 維生素A棕櫚酸酯 = 0.358μg 維生素A丙酸酯 = 1 美國葯典單位（USP）
註：維生素A、維生素D等,這些葯物尚無純品,如用重量單位表示,就不能反映出內在有效成分的真實含量,故改用相對計量方法以特殊「單位」表示該葯的效價.一般以1mg為1個國際單位（IU）

不同的葯物是各不相同的。如國際單位制導出的酶活性單位是mol/s，即每秒酶促反應轉化的底物的量，如酶活性單位用國際單位(IU或U)者，可按1IU=1μmol/min或1IU(或U)=16.67nmol/s換算維生素A，它一個國際單位相當於維生素A乙酸鹽0.344UG（微克）的生物效價。而這個生物效價，是以幼年鼠，喂以缺乏維生素A的食物，與喂以標准品的鼠的發育程度所比較，所得到的數據。維生素E有三種度量方法：國際單位（IU）、毫克（mg）和當量（RE）。換算關系為：1IU d-α-生育酚=1.49mgα-生育酚=1.49α-生育酚當量看到的另一種結果 400 IU的維生素E=267 mg的維生素E 也就是：1 IU的維生素E=0.668 mg的維生素E；1 mg的維生素E=1.5 IU的維生素E

⑤ 維生素當量及單位換算

一個國際單位相當於0.025微克的維生素D3，一微克的維生素D3有40國際單位.所以7.5微克的維生素d相當於300單位的維生素d。 1ug等於40單位的維生素d，7.5ug應該相當於300單位。我們每天維生素d的生理需要量，至少應該在400到600單位。

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.

為了統一計量膳食中的維生素A，而提出的一個概念。其含義是包括視黃醇和β-胡蘿卜素在內的具有維生素A活性物質所相當的視黃醇量。

由於人體 維生素A 來源於動物性食物的維生素A和植物性食物中的 胡蘿卜素 （ 維生素A原 ），而維生素A的常用計量單位為國際單位（IU），胡蘿卜素的常用計量單位為μg（微克）或者mg（毫克），為了統一計量膳食中的維生素A， FAO /WHO（1967）提出了視黃醇當量（Retinol Equivalent, RE)概念。其含義是包括視黃醇和 β-胡蘿卜素 在內的具有維生素A活性物質所相當的視黃醇量。

視黃醇當量、 維生素A 、 β-胡蘿卜素 的換算關系如下：

1μg β-胡蘿卜素=0.167μg視黃醇當量（理論上1分子β-胡蘿卜素能形成2分子維生素A，但因為 胡蘿卜素 的吸收率為1/3，而吸收後轉化為維生素A的 轉化率 又只有1/2，所以，1μg的胡蘿卜素只能折算為0.556IU維生素A，即0.167μg視黃醇當量。1IU維生素A=0.3μg視黃醇當量）

⑥ 維生素d36.0ug是多少國際單位

1440。
維生遲肢春素d的國際單位的換算關系為1國際單位=1IU=0.025ug，碼耐所以維生素d的36.0ug是1400國際單位。
維生素D（簡稱VD）是一種脂溶性維生素，為一組具有抗佝僂病作用，結飢塵構類似的固醇類衍生物總稱。