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Vitamin C serum (L-AA) and self tanner similarities
Maybe many here know this already, but for me this is new:
https://labmuffin.com/vitamin-c-can-stain-skin-avoid/
I had the same problems years ago when I made vitamin C serums with L-AA (15-20%).Whether it’s an expensive brand, like Skinceuticals or homemade: I read the same complaints on forums. With ferulic acid & vitamin E and applied at night.
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