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Question
Posted by: Kevvie | 2010/09/14

IU, mg and mcg

HI Pharmacist,

I am using a program to track nutrition etc. I want to enter the following data 

Vit A 2500 IU (40% as Beta-Carotene) ->  mcg
Vit D 500 IU ->  mcg
Vit E 50 IU ->  mg
Chromium 45mcg ->  mg

Can you perhaps help me pls to convert?

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Our expert says:
Expert ImagePharmacist

For chromium: 45 mcg = 0.045 mg (milligrams)

The rest aint that straightforward since convertin IU (international units) to microgram is a different conversion for every type of drug or vitamin.

The majority of the time fat soluble vitamins are listed in international units (IU). On rare occasions, they may appear in metric units, which throws everyone for a loop. Once you know the equivalents, it's fairly simple to convert IU to mg, then all you need is pen and paper.

Vitamin E

Natural
1 IU = 0.735 mg d-alpha Tocopheryl Acetate
1 IU = 0.671 mg d-alpha Tocopherol
1 IU = 0.861 mg d-alpha Tocopheryl Succinate
Synthetic
1 IU = 1 mg dl-alpha Tocopheryl Acetate
1 IU = 0.91 mg dl-alpha Tocopherol


Vitamin A Acetate

1 IU = 0.344 mcg

Vitamin D

1 IU = 0.025 mcg
40 IU = 1 mcg

The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.

3
Our users say:
Posted by: cheryl eley | 2010/11/26

Please will you give me the conversion rate of 1,000 international units of Vitamin A to milligrams of Vitamin A.

Many thanks,
Cheryl Eley
House of Health, Windermere

Reply to cheryl eley
Posted by: Kevvie | 2010/09/16

Thanks for the reply! :-)

Reply to Kevvie
Posted by: pharmacist | 2010/09/15

For chromium: 45 mcg = 0.045 mg (milligrams)

The rest aint that straightforward since convertin IU (international units) to microgram is a different conversion for every type of drug or vitamin.

The majority of the time fat soluble vitamins are listed in international units (IU). On rare occasions, they may appear in metric units, which throws everyone for a loop. Once you know the equivalents, it's fairly simple to convert IU to mg, then all you need is pen and paper.

Vitamin E

Natural
1 IU = 0.735 mg d-alpha Tocopheryl Acetate
1 IU = 0.671 mg d-alpha Tocopherol
1 IU = 0.861 mg d-alpha Tocopheryl Succinate
Synthetic
1 IU = 1 mg dl-alpha Tocopheryl Acetate
1 IU = 0.91 mg dl-alpha Tocopherol


Vitamin A Acetate

1 IU = 0.344 mcg

Vitamin D

1 IU = 0.025 mcg
40 IU = 1 mcg

Reply to pharmacist

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