Even if we hadn’t already done extensive reporting on the trials and tribulations of dark spots, melasma and other types of hyperpigmentation, I would still be able to tell you that it’s notoriously difficult to treat. Our own HuffPost editors have lamented about pregnancy-induced melasma, post-acne scars and sun spots that just won’t quit, which means finding the effective products that can fade these concerns in meaningful ways is generally pretty high up on our list of priorities. And after numerous reviewer claims likened this one under-$20 product to “magic,” we had to ask professionals why it could possibly be so effective.

After corresponding with Courtney Coons, board-certified nurse practitioner at PERK Plastic Surgery, we learned that the EnaSkin dark spot corrector seems to pack a punch by harnessing known irregular pigmentation fighters all in one advanced formula.

She said that although topical hydroquinone (a product you can only get with a prescription) is generally the gold standard when it comes to treating pigmentation concerns, she recommends looking for a few specific ingredients such as niacinamide, vitamin C, and tranexamic acid — of which this product has all three.