Hyperpigmentation (think freckles and brown patches) is the number 2 concern for Canadian women, say L’Oréal researchers. Too much time in the sun ramps up melanin production, the source of blotches and an uneven, dull complexion. The solution? Products formulated with melanin-disrupting active ingredients. But when the spots are gone, the best thing to keep them from making a comeback is, of course, sunscreen.