Eucerin Even Pigment Perfector Skin Perfecting Serum is clinically and dermatologically tested to diminish hyperpigmentation and promote radiance, revealing an even, refined and glowing complexion. Thiamidol, a patented and effective ingredient, works at the source of hyperpigmentation and has been clinically proven to reduce and prevent its reappearance. Additionally, hyaluronic acid and glycerin provide long-lasting hydration and moisture to the skin, while crystal technology ensures an ultra-light texture for all skin types. Results are visible in as little as two weeks with regular use.