WHITE LIGHTENING SERUM (see product info and clinical study attached) is an excellent PM booster to help target and safely lighten hyperpigmentation spots and/or melasma. It helps to safely brighten the complexion, smooth and soften the skin, and provides both rapid and long-term visible improvements in a hydroquinone-free formula. Sun exposure is the number one trigger for the development of irregular pigmentation, so remember that sunscreen is not just for summer! Make sure you back up your brightening regimen with an excellent sunscreen.