Why is the use of international units important in medicine?

IU (international unit): An international unit (IU) is an internationally accepted amount of a substance.

                    This type of measure is used for the fat-soluble vitamins (such as vitamins AD and E) and certain hormones, enzymes, and biologicals (such as vaccines).

Explanation:

1/0.14nm = 10^10/1.4 a lot

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.