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The Role of Melanin as Protector Against Free Radicals in Skin and its Role as Free Radical Indicator in Hair

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Throughout the body, melanin is a homogenous biological polymer containing a population of intrinsic, semiquinone-like radicals. Additional extrinsic free radicals are reversibly photo-generated by UV and visible light. Melanin photochemistry, particularly the formation and decay of extrinsic radicals, has been the subject of numerous electron spin resonance (ESR) spectroscopy studies. Several melanin monomers exist, and the predominant monomer in a melanin polymer depends on its location within an organism. In skin and hair, melanin differs in content of eumelanin or pheomelanin. Its bioradical character and its susceptibility to UV irradiation makes melanin an excellent indicator for UV-related processes in both skin and hair.


Gematria Test Lab is a service provider for the Household, Industrial, and Institutional Cleaners industry. It specializes in free radical research. Gematria offers a range of services including Antioxidant Power, Antiradical Potential Method, Coating Rate, RHF Radical Protection Factor, RSF Radical Sun/Skin Protection Factor, SAP Skin Antioxidative Protection, and Stability of Carrier Systems testing.

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