When it comes to getting rid of blemishes, Chen stresses that when melanocytes (pigment-producing cells) in people's skin are exposed to ultraviolet light it triggers a complex chemical reaction that causes dark spots.
以除斑來說，陳榮輝強調，人體皮膚原本存在黑色素細胞，受到陽光紫外線照射，引發複雜的化學反應而產生黑斑。