Provided is an injectable composition for intra-articular administration including at least one viscosupplementation agent selected from hyaluronic acid, chondroitin sulphate, keratin, keratin sulphate, heparin, cellulose and derivatives thereof, for example, chitosan, xanthans, galactomannan, alginates, and one or more salts thereof, and a fibroblast growth medium. The viscosupplementation agent and the fibroblast growth medium can be provided in a single composition for injection or as separate components for simultaneous, separate, or subsequent injection over time.
