I used the Allies of Skin Mandelic Pigmentation Corrector Night Serum (£90) every night for a whole month after cleansing my skin with a cream cleanser and topped it off with a hydrating moisturiser. My skin leans dry in the winter but is fairly normal in general. The first week of using the serum, my skin had minor peeling and flakiness. Within a week, I noticed my skin overall was brighter, and the breakouts were gone. By the time it hit Jan 30th, my dark marks from the break out became much lighter, and the contrast between my skin and the dark marks diminished. There is still some discolouration, but it significantly improved from a month ago.