Do I need to use niacinamide twice a day?

When should I use it less often?

If twice daily niacinamide gel leaves your skin excessively dry, reduce application to once daily or every other day. Dryness is a reason to reduce use, not to push through a second application. If your skin is sensitive, start slowly with a low concentration rather than making both strength and frequency ambitious at once.12

How do I fit niacinamide into my routine?

1. 1Choose a low concentration to start, especially for sensitive skin. Most skincare products contain 5% niacinamide or less.
2. 2Cleanse gently, then apply moisturizer. A separate niacinamide product can be applied after moisturizer.
3. 3Use niacinamide once daily to begin. Twice daily use is another option, not a requirement.
4. 4Check how many products in your routine already contain niacinamide. Avoid using too many at once.

Niacinamide is available in moisturizers as well as separate products. Niacinamide can also be paired with ingredients such as vitamin C, ceramides, hyaluronic acid and retinol.1

How long should I give it?

Think in weeks, not individual applications. A 2% niacinamide moisturizer reduced facial oil production and shine over 4 to 6 weeks. Improvements in wrinkles were reported after eight weeks with a cosmetic containing 4% niacinamide. A 5% formula improved fine lines, pigmentation, texture and red blotchiness over 12 weeks. Those are useful timeframes for assessing changes, rather than reasons to add an extra application.2

Niacinamide is a form of vitamin B3, also called nicotinamide. Topical formulas can help with uneven pigmentation and visible signs of skin aging. Niacinamide also supports the skin barrier, helping reduce water loss and improve hydration.234

Can I use niacinamide only on days my skin feels oily?

For oil control, a regular routine is the better starting point: the improvements described above developed over several weeks, not from occasional applications on shiny days. Whether occasional use gives the same benefit is uncertain. Blotting papers absorb surface oil, a job that does not require a serum with an impressive name. Press the paper gently against your face for a few seconds without rubbing.25

Keep using moisturizer even when your skin feels oily. A harsh cleanser can irritate skin and trigger increased oil production, so choose a gentle face wash rather than trying to dry your skin out. See a dermatologist if oiliness concerns you or you are struggling with blackheads or acne.5

What if niacinamide irritates my skin?

Niacinamide is generally gentle, but itching, mild burning, redness and allergic reactions can occur. If you are concerned, test a small amount on your forearm and wait 24 hours before broader use. Stop using a product that irritates your skin rather than increasing its frequency.15