How does Bioelements test SPF 50 FaceScreen? We test in the following ways: Independent Ingredient Testing - We cite independent clinical evaluations, and clinical in-vitro (within a controlled environment/lab), and in-vivo (human) testing to validate the claims of ingredients. These tests are not conducted or commissioned by Bioelements – they are provided to us by the ingredient source. RIPT, Dermatologist Tests for Safety + Efficacy - We follow strict formula quality control via stability and clinical testing to ensure effectiveness and optimum performance. Tests include human repeat patch tests (RIPT), microbial change, pH testing, viscosity, plus visual, odor and tactile integrity. We also conduct dermatologist testing. We never test on animals.