DescriptionsObagi Nu-Derm Sunfader is formulated with 4% hydroquinone and a safe chemical sunscreen. Protects skin from ultraviolet damage while inhibiting pigment cell production that causes dark patches. Product IngredientsActive Ingredients: Hydroquinone 4% Suggested Use1/2 gram applied Obagi Nu-Derm Sunfader evenly over entire face, avoiding eyelids. A sunscreen of at least spf 30 must be applied daily while using this product. NoteObagi System skin care products are prescription strength, or pharmaceutical quality products that work at the cellular level to improve the skin cell function. It is important to contact your Physician or Skin Care Specialist prior to use and purchase. Weight2 fl oz / 57g