Why use products that have not been tested on animals ?
These experiments are horrific. Estimates of the number of animals tortured and killed annually in U.S. laboratories vary widely but are in the millions. more info here
They are unnecessary
These experiments are scientifically unreliable in predicting effects in humans, studies show that because of vast physiological variations between species, human reactions to illnesses and drugs are completely different from those of other animals.
Even if a product has blinded an animal, it can still be marketed to you.
These tests are not required by law.
There are many non-animal alternatives that offer a cheaper, quicker and more accurate solution.