OSL’s Lightening Formula is the most advanced Glutathione formula available. It is the most effective skin whitener available and has numerous other health benefits. Competitively inhibits melanin synthesis in the reaction of tyrosinase and L-DOPA by interrupting L-DOPA's ability to bind to tyrosinase during melanin synthesis. These results indicate that glutathione inhibits the synthesis and agglutination of melanin by interrupting the function of L-DOPA.It is the master anti-oxidant that helps fight free radicals that cause skin damages. It also contributes to good liver function. Our clinical studies showed that Glutathione works best with the combination of Vitamin C and Collagen.