If you want to cover up pimples, birthmarks, or other unwanted things, then a concealer is the way to go. This product is dermatologically tested, which means it's been tested on humans.
From Shiseido
SHISEIDO MAKEUP-Synchro Skin Self-Refreshing Concealer - 101
Cosmetify
Shiseido Synchro Skin Self Refreshing Concealer 101-Fair
This product is also available at 4 unverified merchants.