Uneven skin tone, melasma, and stubborn dark spots? From vitamin C to azelaic acid to tranexamic acid and hydroquinone—this is what dermatologists recommend, backed by science and results. Learn exactly what works, why it works, how long it takes, and how to use it properly. Introduction: Why Treating Hyperpigmentation Isn’t One-Size-Fits-All Hyperpigmentation is one of …