Can You Convert IU Into Grams?


3 Answers

Amalia Syeda-Aguirre Profile
Realistically the answer is no, you can't. The reason is that IUs, or International Units, tend to measure the potency of a drug, not its mass or weight.

Ideally you should not convert IU to anything else. There cannot be a direct conversion or comparison into grams or milligrams. International Units tend to be assigned to substances for which it is very difficult to standardise the tests and measure the substances. It is done this way to gauge the biological effects regardless of the difficulties in labelling such substances.

Some of these substances come in different forms, and in these different forms it can differ in potency. Conversion guides for one form could be totally inaccurate for another, and even if you were to convert each different form of all the different substances there are still the variables that dictate amount, potency and form, not to mention the accuracy of the conversions.

Some things can be converted. Vitamins are fairly easy to do so, and include vitamin A (Retinol, Acetate, Propionate, Palmitate), Beta Carotene, vitamin B1 (Thiamine), vitamin B2 (Riboflavin) vitamin C, vitamin D and vitamin E (natural and synthetic). Some enzymes, hormones and antibiotics can also be converted.

This vitamin conversion is a good point though. IUs are common within vitamin measures but there can be differences in mass; for example, 1000 IUs of vitamin A has a different mass to that of 1000 IUs of vitamin E.
Aisha Profile
Aisha answered
IU stands for 'International Unit' and is determined by international standard to be a certain amount. It is different for every single drug or vitamin. So if you post the name of the drug I may be able to look it up, but the information is not too easy to find.
Some information here:

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