As per research, most effective skincare ingredients which help to even/ brighten skin are as follows in no particular order- Niacinamide- Alpha Arbutin- Retinoids- AHA- Azelaic Acid- L-ascorbic acid (Vitamin C)- Kojic Acid https://www.thedeconstruct.in/product/brightening-serum-10-niacinamide-0-3-alpha-arbutin/