SNP Glutathione Dark Zero Toning Patch Benefits The Glutathione Dark Zero Toning Eye Patch is a new functional eye patch product from SNP, a hyperactive derma brand established in 2008. The Glutathione Dark Zero Toning Eye Patch is designed [TIME DEAL] SNP Glutathione PDRN Bright Turn On Pad 170ml (60pads) Brighten and even your complexion with SNP Glutathione Dark Zero Toning Patch! STEP 1 Niacinamide : Reduces the transfer of melanin to the skin's surface. STEP 2 99%