![]() Luckily, DHA can convert back to L-ascorbic acid, and there’s no evidence that it’s bad for your skin (there’s actually a product with an accompanying non-peer-reviewed study that actually uses it as a way of getting vitamin C into your skin more easily). In one study at pH 3.52 and 25 ☌ in amber glass, 50% is gone in a week. It turns into yellow dehydroascorbic acid (DHA or DHAA) and other products quickly. The big problem with using vitamin C in products is that L-ascorbic acid is very unstable in water-based products. Related post: Antioxidants in Skincare: What Do They Do? The Problem With Vitamin C Who wouldn’t want this, right? It does a bit of everything! Acts as an antioxidant, protecting against free radical damage from UV, pollution and natural aging. ![]() Fades hyperpigmentation (brown marks like acne scars and sun spots).Can increase collagen, which plumps up skin and decreases wrinkles.Vitamin C is a superstar anti-aging ingredient in skincare. 6 Questions about this recipe What Does Vitamin C Do in Skincare?
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