Since niacinamide is non-acidic, you can put it under products with a similar pHlike your hydrating serum, moisturizer and/or sunscreenwithout having to wait in between layers
However, it should be noted that these results are not conclusive and further well-designed studies are required
Subjects received either test formulation T1 or T2 (406 mg per person) in a fasting state, administered with 240 mL of warm water
[DOI] [PMC free article] [PubMed] [Google Scholar] 120.Rose E., Odle J., Blikslager A., Ziegler A

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