The short answer
Niacinamide is not on standard pregnancy avoid lists and is one of the ingredients most often suggested as a substitute for retinoids. Confirm anything you use with your own clinician.
On labels you may see it as: vitamin B3, nicotinamide.
Context
What Niacinamide does
Niacinamide is a precursor to NAD+ and feeds into the skin's production of ceramides and other barrier lipids, which is why it tends to reduce water loss and reactivity over a few weeks.
It also interrupts pigment transfer from melanocytes to surface skin cells, giving a slow, gentle evening-out of post-acne marks and general blotchiness.
Typical use on shelf: 2%–5% is the well-supported range; 10% products exist but trade tolerance for headline numbers..
Watch-outs
What to keep in mind
- Very high concentrations (10%+) cause flushing and irritation in some people, with no clear extra benefit over 4–5%.
- The old warning about niacinamide cancelling vitamin C comes from lab conditions with heat; on skin it is not a practical problem.
Next step
Check your whole routine, not one ingredient
One ingredient rarely decides anything. Paste the full list from each product you use into the pregnancy ingredient checker and take the flags to your clinician. The full write-up on Niacinamide — what it does, irritation, pore-clogging risk — is on the Niacinamide explainer.
Other ingredients in pregnancy
AllantoinAlpha ArbutinAvobenzoneAzelaic AcidBakuchiolBenzoyl PeroxideCentella Asiatica ExtractCeramidesCoconut OilDimethiconeGlycerinGlycolic Acid
See every ingredient at a glance →