SkinCeuticals offers SymWhite® exclusively in its bespoke CUSTOM D.O.S.E. serums, which are blended in select Yes, SymWhite® has been shown to provide visible improvement in the appearance of skin discoloration, uneven skin tone, and overall brightness.skincare professionals’ offices using the patented SkinCeuticals diagnostic skin-analysis tool. When used once or twice daily after cleansing and toning, skincare formulas that contain SymWhite® (such as SkinCeuticals CUSTOM D.O.S.E) can provide improvement in the appearance of skin discoloration, uneven skin tone, and overall complexion brightness. Your SkinCeuticals skincare professional will provide exact application instructions that fit into your existing daily skincare routine.