What should you know about topical niacin?

Niacinamide is a form of vitamin B3 commonly used in serums, creams, and cleansers. It may help the skin retain moisture, reduce the appearance of redness, and make pores or uneven pigmentation look less noticeable over time. “Niacin” and “niacinamide” are related but not identical ingredients, so check the label rather than assuming they behave the same way.

Apply the product as directed to clean skin, beginning with a modest routine if you are prone to sensitivity. Test it on a small area first when practical, and avoid adding several new actives at once so you can identify a reaction. Moisturiser and daily sun protection can support the overall routine. Stop if a rash, swelling, or persistent burning appears.

Get urgent help for facial swelling with breathing or swallowing difficulty. Seek dermatology advice for a reaction that continues after stopping the product, or for persistent acne, redness, or pigmentation that has not been assessed; a skincare ingredient may not address the underlying condition.

Ask whether niacinamide suits your skin concern, which formulation fits your routine, and whether another active could irritate you. Clarify how to combine it with prescription treatments and what improvement or reaction should lead to a review.