numbuzin's brightening serum built around an unusually high concentration of actives: over 60% lingonberry extract, 5% niacinamide, 4% tranexamic acid, plus a glutathione antioxidant network with vitamin C and vitamin E. It's designed specifically to fade dark spots, post-acne marks and uneven tone rather than address ageing or texture — a distinct routine step from the No.9 line.
Apply after toning, morning and night, patting in to help absorption. The texture is lightweight and non-sticky despite the ingredient concentration, and the formula has passed low-irritation testing with a 0.00 irritation score, making it comfortable for daily use even on reactive skin. Results build with consistent use: expect a more even tone and fading of dark spots over four to six weeks.
Best suited to anyone specifically targeting hyperpigmentation, dark spots or acne marks rather than general dullness — a targeted pick for a genuine brightening gap in the routine.
