Vitamin C has a range of skincare benefits from firmer skin to fewer wrinkles and dark spots—but the ingredient is notoriously finicky. As an antioxidant, it’s prone to oxidizing, meaning that it breaks down when it’s exposed to air, light and heat. If you’ve ever had a vitamin C serum that turned orange or brown in color, you’re familiar with this concept. There are vitamin C derivatives out there that are more stable than others, but research shows that they’re not as powerful as pure vitamin C, or l-ascorbic acid.
Enter vitamin C powder. L-ascorbic acid powder is highly stable and can be mixed into your skincare products for an antioxidant boost. Because you mix the powder into a dollop of a serum or moisturizer before applying, it’s like mixing up a fresh (and guaranteed potent) dose every time. If you decide to try a vitamin C booster powder, there are a few things you should keep in mind.
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