Iu Meaning In Vitamins. This type of measure is used for the fat soluble vitamins such as vitamins a d and e and certain hormones enzymes and biologicals such as vaccines. Yes it is the greek symbol.
In pharmacology the international unit is a unit of measurement for the amount of a substance. 0 5mg is the same as 500μg. Yes it is the greek symbol.
The volume or mass that makes up one international unit is dependent on the concentration or potency of the substance and therefore varies from substance to substance depending on what is being measured.
The mass or volume that constitutes one international unit varies based on which substance is being measured and the variance is based on the biological activity or effect for the purpose of easier comparison across substances. For example 1 iu of vitamin e is equivalent to 0 66 milligrams of delta alpha tocopherol or 1 milligram of alpha tocopherol acetate. Alpha tocopherol vitamin e is the one with the most bioavailability in humans and you need 22 4 iu of this form of vitamin e daily. 15mg of beta carotene 25 000iu of vitamin a activity.
