The present invention relates to a cosmetic or pharmaceutical formulation comprising a hyaluronate crosspolymer and one or more of (a) azelaic acid or an ester thereof; (b) one or more of black cumin seed oil, chaulmoogra oil, magnolia bark extract and manuka oil; and (c) resveratrol or a derivative thereof. Uses of the formulation for skin treatments, promoting collagen production and regulating cellular turnover are also described.