PromaCare-KDP offers more efficacious skin lightening effects. Compared with kojic acid, PromaCare-KDP markedly enhances the inhibiting effects on tyrosinase activity, which prohibits the formation of melanin. Overcoming the instability of kojic acid to light, heat and metal ion,while maintaining inhibition on tyrosinase activity, blocking production of melanin more effectively than kojic acid, and more stable, Efficient whitening agent for skin lightening formulations.