Non-stop Restrain Melanin Buildup, Long-lasting whitening effects!O"slee White Medi Perfect Whitening Serum contains with the latest world best whitening ingredient - SYMWHITE? 377, comes from botanic plant extracts, is one of the most effective Tyrosinase Inhibitor, performs a powerful whitening effect with low Irritant reaction. Strongly retrain melanin buildup; its whitening effect is 20 times more than Kojic Acid. The test proves that it can 100% reduce Melanin in 24 hours.The graphs show 2 test tubes with melanin growth liquid: Adding O"slee White Medi Perfect Whitening Serum into test tube A while Test tube B with nothing added. After 24 hours, the color of test tube A with O"slee White Medi Perfect Whitening Serum is remaining unchanged. No Melanin is built-up.The color of test tube B without mixes any whitening serum turns to black, large amount of melanin is build-up. More Benefits:Potent anti-oxidation , enhance whitening effectNatural Papaya Enzyme , instant brightening and even skin toneSympeptide TM 222, anti-aging and firming skinHyaluronic acid, intensive hydrating