Oubo's toner for brightening dull skin is a targeted solution for lackluster, tired complexions. The formula combines 5% glycolic acid (AHA) for gentle exfoliation, 2% tranexamic acid for pigment reduction, and 1% vitamin B3 (niacinamide) for even skin tone. Glycolic acid removes dead skin cells, revealing fresher skin beneath, while tranexamic acid inhibits the enzymes that cause hyperpigmentation. Niacinamide improves skin texture and reduces the appearance of pores. The toner also contains licorice root extract, a natural brightener, and hyaluronic acid for hydration. This multi-action approach addresses the root causes of dullness—dead skin buildup, pigmentation, and dehydration. Clinical trials show a 38% increase in skin radiance after four weeks, with 87% of users reporting brighter, more youthful skin. The toner's gentle exfoliation makes it suitable for weekly use, transforming dull skin into a glowing canvas.