LDK, regarded as the authority in Japan which provides for high-quality 3rd party reviews that consumers can trust, conducted testing on 7 serums for its ability to lessen the number of latent dark spots, in its article published on January 3rd, 2018. Testing compared the number of latent dark spots at day 0 and two week after daily applications. Transino Whitening Essence by Daiichi Sankyo ranked the best by reducing the number of latent dark spots by 124 #pigmentation #brownspots #serum