Hyaluronic acid garners enough of its own buzz in the skincare community, but when it’s paired with vitamin C in the Vichy LiftActiv serum, shoppers noted significant results. “Boy does this stuff do miracles. I didn’t even realize a cream could lighten the dark circles under my eyes. I thought that was a thing only sleep could help. My complexion is so even now and my face is crazy smooth and soft,” one shopper wrote. To buy: $24 with coupon (was $28); amazon.com. Melissa Kanchanapoomi Levin, MD, a board-certified dermatologist in New York City, previously told Real Simple that “vitamin C is one of the most studied, potent, and plentiful antioxidants in human skin,” adding that “it continues to be one of the most recommended treatments for improving uneven skin tone, texture, acne scars, dullness, and fine lines.” Vichy’s LiftActiv serum uses the powerhouse antioxident, along with ingredients like hyaluronic acid and vitamin E, to brighten and even out skin tone. Users should apply four drops before moisturizing and it can be used as part of their morning and evening skincare routines. “When I tell you that I have seen a tremendous difference in my skin over the past few weeks since starting with this serum, I am not kidding,” a reviewer wrote. “I have struggled with acne for years and all of it has since cleared up. My skin looks very refreshed and healthy, and I have not felt this good about my skin in a very long time.” Others wrote of improved skin texture and clarity, while another customer called it a “perfect addition to your skincare routine.” They added, “It removes dark spots and when combined with your night/day moisturizers it makes skin very supple.” (Note: Dr. Levin confirmed that vitamin C can be combined with other products in your skincare routine. However, a patch test is suggested when starting any new skin product.) Leave uneven skin in the past and try this serum for yourself. Just don’t be surprised at how quickly it works, as some shoppers noticed results in a “few days.”