This powerful serum helps to improve brightness, clarity and radiance by 60% in less than one week.* This fast-acting formula has double the brighteners to boost radiance and reverse visible signs of environmental damage. Resilient-C Complex delivers highly stable vitamin C-with 50 times the potency of prior generations-to improve skin radiance, support natural collagen production, and protect against free radical damage. Dermatologist developed. Tested on people, not animals. Formulated without parabens, sulfates, and phthalates.