Abstract: Implantable preparation comprising a material which can be obtained from globin that has been modified, especially chemically, to be, at least partially, soluble at physiological pH, the material being biocompatible, and biodegradable in the organism. The material may be soluble at physiological pH, or insoluble at that pH. The preparation may be in the form of a solution, suspension, paste, gel, film, sponge, powder or granules, or a solid implant. Application in particular to the healing, protection or filling of external skin wounds, the filling of wrinkles and skin flaws, the filling of tissue, as means for fixing prostheses or biomaterials, or means for preventing adhesion.