Vitamin C is a nonnegotiable in any solid skin-care routine, but when it comes to fighting signs of aging, not all serums deliver the same results. In a recent NewBeauty survey of more than 1,300 readers,* one formula stood out from the rest: Alastin C-RADICAL Defense Antioxidant Serum ($178). Designed to go beyond brightening, this science-backed serum is earning praise for its visible, age-defying results. Here’s what to know.
What Readers Love About Alastin C-RADICAL Serum
True to its claims, one 65-year-old with normal skin said the serum “softened some lines near my mouth,” while a 41-year-old with combination skin praised the “visible results.” A 61-year-old with dry skin kept it simple when asked what she loved most about the product: “The results.”

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About the Formula
This advanced serum features a proprietary encapsulated form of vitamin C (sodium ascorbate), which the brand notes is clinically proven to reduce the effects of free radicals by up to 74 percent. Not only does the formula help brighten the skin and smooth visible signs of aging like fine lines, wrinkles and discoloration, but it also supports collagen and elastin. It’s packed with 15 potent antioxidants, including green tea and centella asiatica, to help defends against daily damage from UV exposure, pollution and blue light, while helping to even skin tone and refine texture over time.
So if you’re in the market for a new vitamin C serum, why not invest in one that checks multiple anti-aging boxes—hydration, brightening, and real, visible results?