Peter Thomas Roth Potent Botanical Skin Brightening Gel Complex.A hydroquinone-free gel formulation for normal, aging, oily, and problem skin types. Not recommended for sensitive skin. Brighteners may be used if you are allergic to hydroquinone, or after the maximun benefits of a full six month treatment cycle of our 2% hydroquinone Lighteners is completed. Contains the skin brightening properties of kojic and azelaic acids.