SKINFOOD Black Sugar Perfect First Serum The Essential is a dual-function skincare product that improves whitening and wrinkles. It harnesses the power of fermented black sugar, which has been aged for 672 hours, to create a smooth and tight complexion. The water essence texture provides deep hydration without any stickiness, leaving your skin moisturized and refreshed. This serum contains 30% black sugar extract, which helps to create a dense and smooth skin texture. Start your skincare routine with this serum to achieve a clear and radiant complexion.