Does the eye base protects the eyelid from dangerous chemicals in the eyeshadow?
Eyeshadow base helps the makeup last all day. If there were dangerous chemicals (carcinogens) in makeup, it would have been pulled from the market. There are paraben free brands of makeup; search the internet and you will find them. But really, you should take the time to research what you heard about dangerous chemicals in makeup. Look at the source, who they represent, and look for scientific results from reputable sites. You will find that there is nothing to support the claims that makeup causes cancer.