Shereene Idriss warns that ascorbic acid vitamin C is highly unstable. Use products quickly, choose pump dispensers over droppers, and look for opaque packaging that blocks light.
Number two, when it comes to ascorbic acid especially, she's extremely unstable. So if you are going to use it, you better use it relatively fast, especially if she's coming in a dropper. Which leads me to number three, droppers are not the ideal form of packaging. An active form of vitamin C. Yes, a pump is not 100 airless, but at least it is protecting the solution better than a dropper. If you're going to use the active form of vitamin C, get it in a pump. And last, make sure that the packaging itself is opaque and protective against light. There you have it. If you have any questions or comments, let me know below.
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