Can you use niacinamide with retinol?
Short answer: Yes. Niacinamide and retinol are safe and effective to use together, and niacinamide can actually make retinol easier to tolerate. The popular idea that niacinamide "cancels out" retinol is a myth with no real evidence behind it.
If you have read that these two should never share a routine, you are not alone. It is one of the most repeated pieces of skincare folklore. The good news is that it is also one of the easiest to put to rest.
Yes, and they work in different ways
Retinol and niacinamide act through separate pathways. Retinol works on skin-cell turnover through retinoid signalling. Niacinamide (vitamin B3) supports the skin barrier and calms inflammation. Because they are not competing for the same job, one does not switch the other off. In a randomised controlled trial, a regimen that combined niacinamide with a retinoid was used successfully to improve the look of wrinkles, which is exactly the kind of pairing the "never mix" rule says should not work.
Where the "niacinamide cancels retinol" myth comes from
Here is the honest part: we could not find a single primary study showing that niacinamide neutralises retinol. The claim appears to be a mix-up with a different, older worry about niacinamide and high-strength vitamin C, where the concern was a flushing reaction, not a cancelled-out active. That reaction needs extreme conditions, like high heat and very low acidity held over time, which is not how a cream sits on your face. So the rule people repeat with such confidence traces back to no checkable source at all.
Niacinamide can make retinol easier to tolerate
This is the best-supported part of the story. Topical niacinamide has been shown to increase the skin's own ceramides and strengthen the barrier, which reduces water loss. A stronger barrier copes better with the dryness and flaking that retinol can cause. In the same controlled trial noted above, the niacinamide-containing routine was better tolerated than prescription tretinoin across eight weeks, with less redness and dryness. So rather than fighting each other, niacinamide can quietly cushion the parts of retinol people struggle with.
How to use them without irritation
The real caution here is retinol itself, not the pairing. Retinol can sting, dry or flake, especially in the first weeks. Introduce it slowly, perhaps one or two nights a week to start, and build up as your skin allows. Patch test first if you are sensitive. Use retinol at night and wear sunscreen during the day. Niacinamide can be used morning or night. The exact order you layer them matters far less than going slowly and keeping your barrier happy, so do not lose sleep over which one goes on first.
Sources: Fu JJJ et al., British Journal of Dermatology, 2010 (PMID 20374604): a combined niacinamide and retinoid regimen improved wrinkles and was better tolerated than tretinoin. Tanno O et al., British Journal of Dermatology, 2000 (PMID 10971324): topical nicotinamide raises ceramide levels and strengthens the skin barrier.