I LOVE the sunscreen I use (Beauty of Joseon Relief Sun: Rice + Probiotic SPF50+ PA++++) but it has niacinamide in it. Does that impact the effectiveness of the Vitamin C serum I use in my am routine? Many day creams contain niacinamide as well.
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According to this article, it should be fine: https://www.byrdie.com/niacinamide-and-vitamin-c-4845348
I also use a vitamin C serum in the morning, and my daycream contains niacinamide. Haven't noticed any problems.