Formulated in the Active Skin Repair labs in California and ewg verified, Active Skin Repair hydrating serum is powered by hyaluronic acid: a substance naturally produced by the human body that is known to help hydrate and promote skin barrier function while protecting against environmental toxins. Dermatologist-tested and suitable for all skin types, including sensitive skin. fragrance-free, paraben-free, dye-free, phthalate-free, and sulfate-free, The Active Skin Repair Hydrating Serum is gentle on your skin yet powerful enough to deliver outstanding results. Add our hydrating serum after using active skin repair spray or hydrogel to harness the power of both hypochlorous and hyal.