If you want to cover up pimples, birthmarks, or other unwanted things, then a concealer is the way to go. This concealer is dermatologically tested, which means it's been tested on humans.
Maybelline Super Stay Liquid Concealer Makeup, Full Coverage Concealer, Up to 30 Hour Wear, Transfer Resistant, Natural Matte Finish, Oil-free, Available in 16 Shades, 10, 1 Count