Clean ingredients are nontoxic, gentle, and free from skin-irritating ingredients. They are also always environmentally friendly and cruelty-free, with ingredients sustainably derived from plants or nontoxic synthetic sources. Clean ingredients are clinically tested by third parties for stability and efficacy.
Natural ingredients may be irritating or harmful to skin, may be sourced from endangered plants, animal by-products, or threatened ecosystems and the ingredient efficacy may be unpredictable.