EWG's Skin Deep is an online database created by the Environmental Working Group that evaluates the safety of personal care products. It provides consumers with information on the ingredients used in cosmetics and skincare items, helping them make informed choices about what they apply to their skin. The database rates products based on their potential health hazards, using a scale from 1 to 10, with lower scores indicating safer options. Users can search for specific products or browse categories, making it easier to find items that align with their health and safety preferences.