International Units (IUs)

 

On food labels, vitamins A, D, and E are sometimes reported in milligrams or micrograms and sometimes in International Units (IUs). Even more confusing, the term International Unit has a different meaning for each vitamin.

 

To clear up this perplexity, here are links to precise definitions and conversion factors:

 

   International Units of Vitamin A

 

   International Units of Vitamin D

 

   International Units of Vitamin E