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Old 12-23-2009, 03:08 AM
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Default Re: IU to micrograms

Originally Posted by Unregistered View Post
How to convert the IU into micro gram
Please breifly tell about the conversion formula.
One IU=?
It is based on an agreed level of activity in the body. It is different for every substance. In some cases (Vitamin A) there are two or more forms which work the same in the body, but have different levels of activity, and therefore relation between IU and milligrams. You simply have to look it up, there is no standard conversion, it is substance by substance.
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Old 04-23-2010, 07:45 PM
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Question Re: IU to micrograms

How to convert Lycopene (10%) too microgram to IU
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Old 09-19-2010, 10:00 AM
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Exclamation Re: IU to micrograms

Originally Posted by View Post
The daily need of Vit. A is 1 mg which are 1000 micrograms which are 40 000 IUs. Therefore when spoken about Vit. A there is never referred to in micrograms or IU (= International units).
This is not correct expically if you are a woman who is pregnant or lactating!! geting too much vit A is dangours!

The statndard measurement of vit A is RAE (retinol actiivity equivalents), wich is baced potency and sorce

1 mcg of retional (preformed vit A)=1 mcg RAE;
12 mcg beta-carotene= 1 mcg RAE
and 24 mcg alpha-caroten= 1 mcg RAE

1 mcg (RAE) = 3.3 IU

1,000 mcg REA = 1mg RAE= 3,300 IU

you must first make sure that the mg is reffering to or converted to mg RCA to find the IU amount.

this conversion may not work on all types of vits becuse genuarly speaking mg is wight and IU is a unit and can not syimply be cnverted. it would depend on the type of vit, or mineral and it's form.
__________________________________________________ _____

More importan info on vit A

preformed A (found in animal products such as eggs,cheese,milk and liver) is used directly by the body. This is the type of vit A you shuld monter the most, as it is the type that has been found to cause birth defects and liver fealure in high doses. (trhough you still need preformed vit A it is importan not to get to much.)

The other type of vit A is Provitamin A (found in fruit and vegies, two common types are beta-carotene and alph-carotene) which your body converts into vit A

beware of liver expicaly if you are prego as beef liver contains 12 times the RDA of vit A in just one serving

How much is too much?

In the US (other cuntrys RDA levels may verry, but likly not much):

(acordding to the APA)
The recommened dayly allowance (RDA) combined vit A for age 19-50 is 770 mcg or 2,541 IU with a tolerable upper intake level (UT) or mazum tolrance of 3,000 mcg or 9,900 IU (less if you are not prego/ lactacting)

The us govement however conserders 10,000 IU to be the max amount combined each day for woman over 19 and 9,240 for woman under 19.

for the list of vitamin & mineral gidelines (for women) go to the American Pregnancy Association (it gives gidelines for all woman age 14-50)


Im not sure what the max is for a man is, men do genuraly need slightly more vit A than whemen. However, I'm quite sure that 40,000 IU is to much expacilly if you are not an athlete.

though you do not have to wory about birth deffects there are sevaral other problems that can be caulsed by over doseing on Vit A

the aproxament amount of vit A in a 2000 cal diet (for men and wman) is 5000 IU between 1,515.15 mcg and 1,515.16 mcg

Men genarly tend to eat more animial products so more of that vit A is likely performed A. in order to be sure you are not geting to much vit A absorbed avoid napping or sitting infront of the tv right after meals. Insted try taking a 15-20 min walk or doing some things arond the house first.
and don't be afraid of those veggies lol

hope this helps stay helthy!
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Old 10-27-2010, 05:06 AM
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Default Re: IU to micrograms

please help me to coverting 1 IU of heparin to milligrams.
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Old 04-11-2011, 09:34 AM
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Default Re: IU to micrograms

could someone please tell me what 800 iu of folic acid is into micrograms please?
i can't find any answers on the internet.

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Old 07-17-2011, 06:56 PM
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Default Re: IU to micrograms

I found the following information on how to convert several vitamins from IU to miligrams/micrograms/nanograms.

international unit (IU)
a unit used to measure the activity (that is, the effect) of many vitamins and drugs. For each substance to which this unit applies, there is an international agreement specifying the biological effect expected with a dose of 1 IU. Other quantities of the substance are then expressed as multiples of this standard. Examples: 1 IU represents 45.5 micrograms of a standard preparation of insulin or 0.6 microgram of a standard preparation of penicillin. Consumers most often see IU's on the labels of vitamin packages: in standard preparations the equivalent of 1 IU is 0.3 microgram (0.0003 mg) for vitamin A, 50 micrograms (0.05 mg) for vitamin C, 25 nanograms (0.000 025 mg) for vitamin D, and 2/3 milligram for (natural) vitamin E. Please note: for many substances there is no definite conversion between international units and mass units (such as milligrams). This is because preparations of those substances vary in activity, so that the effect per milligram of one preparation is different from that of another.
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Old 08-24-2011, 08:36 AM
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Cool Re: IU to micrograms

Online Conversion FAQ says
"IU stands for International Units and is used for the measurement of drugs and vitamins.

Webster's defines IU as: a quantity of a biologic (such as a vitamin) that produces a particular biological effect agreed upon as an international standard

What this means is that IU is dependent on the potency of the substance, and each substance would have a different IU to milligram conversion. For example, 1000 IU of Vitamin C would have a different weight than 1000 IU of Vitamin A

Since each substance would have a different conversion ratio, we cannot put up a conversion for IU to milligrams that covers everything, or even most things. Just too many different substances.

So what can you do?

Your best bet would be to contact your pharmacist. They have all the information anyone could ever want about drugs and vitamins.

You could also contact the manufacturer of the vitamin. Most manufactures will have a web site with contact information so you can email them. Try searching the web using the manufactures name or the name of the vitamin."
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Old 09-17-2011, 12:59 PM
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Default Re: IU to micrograms

convert 18 mg of vit E to internationalunit
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Old 01-31-2012, 08:28 AM
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Default Re: IU to micrograms

To convert Vitamin A as retinol:
From IU to mcg: IU * 0.3 = mcg
For example: 5000 IU * 0.3 = 1500 mcg
From mcg to IU: mcg / 0.3 = IU

To convert Vitamin A as beta-carotene:
From IU to mcg: IU * 0.6 = mcg
For example: 5000 IU * 0.6 = 3000 mcg
From mcg to IU: mcg / 0.6 = IU

To convert Vitamin D:
From IU to mcg: IU * 0.025 = mcg
For example: 400 IU * 0.025 = 10 mcg
From mcg to IU: mcg / 0.025 =IU

To convert Vitamin E if the product label has DL-Alpha-tocopherol as the ingredient:
From IU to mg: IU * 0.9 = mg
For example: 30 IU * 0.9 = 27 mg
From mg to IU: mg / 0.9 = IU

To convert Vitamin E if the product label has D-Alpha-tocopherol as the ingredient:
From IU to mg: IU * 0.67 = mg.
For example: 30 IU * 0.67 = 20.1 mg
From mg to IU: mg / 0.67 = IU
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Old 08-26-2012, 11:04 PM
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Red face : IU to micrograms

Originally Posted by unregistered View Post
the usda nutrient data lab reports vitamin d in iu. The national academy of sciences reports the amount of vitamin d in micrograms. Do you know what iu is and how it can be converted to micrograms?

Thank you for your assistance.
in mg= iu/100. For vit.d3
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