Polymerization of hydroxytyrosol mediated by horseradish peroxidases

A method of producing polyhydroxytyrosol, comprising reacting hydroxytyrosol monomers or derivatives of hydroxytyrosol monomers having functional groups selected from the group consisting of methoxy, methyl, ethyl, sulfonate, carboxylate and hydroxyl groups in a mixed solution consisting of an enzyme consisting of a horseradish peroxidase in the range of from about 0.4 mg/mL to about 2 mL of the mixed solution, hydrogen peroxide, and an aqueous solvent consisting of a water/ethanol mix from the group consisting of about 70:30, about 80:20 and about 90:10 to produce polyhydroxytyrosol that has an absorbance in the ultra violet, visual and infra red frequency bands including an absorbance of about 0.1 at 1200 nanometers.