What it is: Tata Harper Concentrated Brightening Serum, $220What it does: Reduces brown spots and uneven skintone with 100 percent natural ingredients.Why it works: There are a ton of all-natural skincare lines out there, but it’s always a little suspect whether or not those products, you know, do anything. Tata Harper, on the other hand, has her very own R&D lab right there on her bucolic organic Vermont farm (where she also grows many of the ingredients found in the products) so she can ensure the potency of every single product.Hyperpigmentation is tricky to treat—those melanocytes (melanin-producing cells) are stubborn as all get out. Once a brown spot has surfaced, it’s really hard to fade it with topical skincare, but company studies show ingredient sea daffodil flower extract reduces spots 63 percent in 42 days, sea fern algae extract prevents new synthesis of melanin, and Norwegian kelp increases the skin’s natural melanin elimination rate in just three days.Says Harper, “This product affects melanin deep in the skin. It takes longer to work, but the effects last.” In other words, slow and steady wins the race.Why you care: 64 percent of YouBeauty readers say their skin isn’t as radiant as it used to be. Glowing skin looks young and healthy, and this serum can help.MORE: Tatcha’s Gold-Flecked Facial Oil

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