How long should you wait between Niacinamide and Glycolic Acid?
Does It Mix engine · wait time
No special wait is needed. Apply Glycolic Acid first, give it a minute to absorb, then the other.
The routine
- PM: glycolic acid, wait a few minutes, then niacinamide and moisturizer.
- Or niacinamide in the morning and glycolic acid at night.
- Sunscreen daily, since AHAs raise sun sensitivity.
Why: full Niacinamide + Glycolic Acid answer and sources.
FAQ
Does waiting 20 or 30 minutes between products help?
We haven't found good evidence that a set wait of many minutes changes how most skincare works. The practical reason to pause is letting each layer absorb so the next one doesn't pill or sting.
Sources
- Bissett DL, et al. Niacinamide: a B vitamin that improves aging facial skin appearance. Dermatol Surg. 2005;31(7 Pt 2):860-865.
- Kornhauser A, Coelho SG, Hearing VJ. Applications of hydroxy acids: classification, mechanisms, and photoactivity. Clin Cosmet Investig Dermatol. 2010;3:135-142.
- Kaidbey K, et al. Topical glycolic acid enhances photodamage by ultraviolet light. Photodermatol Photoimmunol Photomed. 2003;19(1):21-27.