Provided are materials including cell proliferation properties. The materials may include a polymer having incorporated therein a synergistic combination of at least two metal oxide powders, including a mixed oxidation state oxide of a first metal and a single oxidation state oxide of a second metal. The mixed oxidation state oxide may constitute from about 25% wt. to about 75% wt. of the total weight of the synergistic combination of the at least two metal oxide powders. The powders may be incorporated substantially uniformly within the polymer. The ions of the metal powders may be in ionic contact upon exposure of the material to moisture. Further provided are methods for the preparation of the materials and uses thereof, including in skin regeneration processes and cosmetic applications.
