Niacinamide Uses and Benefits for Skin

Niacinamide is a form of vitamin B3 used in topical serums to improve the look of uneven tone and excess shine, with steady use over weeks.

Walk down any skincare aisle and niacinamide is on half the labels, which makes it easy to expect it to fix everything. In practice it is a steady, unspectacular worker: it helps a few visible things look better over weeks, and it does little on its own for deep marks or active breakouts.

What niacinamide is, and what it is not

Niacinamide is a form of vitamin B3 made for topical skincare, and it is the same ingredient as nicotinamide under a different name.¹ In serums and moisturisers it sits alongside ingredients such as kojic acid, ceramides, or salicylic acid, depending on what the formula is built to do. It is not an exfoliating acid or a retinoid, so it does not peel the surface.

A niacinamide tablet is a different thing from a niacinamide serum: tablets are taken by mouth for general nutrition, while a serum goes on the face for the look of the skin. What a supplement does inside the body tells you nothing about what a serum does on the cheek, so judge a serum only by topical evidence and your own skin.

What niacinamide does for your skin

The starting point is a 12-week split-face study in which 50 women applied a 5% niacinamide moisturiser to one half of the face and a plain moisturiser to the other half twice daily. The niacinamide side showed significant improvement against the control side in the look of fine lines and wrinkles, hyperpigmented spots, red blotchiness, and yellowing, along with better elasticity readings.¹ That is appearance-led change over three months, not a quick fix, and results vary from person to person.

• Uneven tone looks more even. In an eight-week split-face trial in 27 melasma patients, 4% niacinamide and 4% hydroquinone, a skin-lightening medicine, both improved pigment, with no statistical difference between the two sides on instrument measures, and good to excellent improvement in 44% of patients using niacinamide and 55% using hydroquinone.² Sunscreen was used throughout, which matters because fresh sun keeps making the pigment the serum is trying to soften.
• Oily-looking skin looks less shiny. In two small trials of a 2% niacinamide moisturiser, the treated group showed lower sebum excretion readings after two and four weeks in one trial, and lower casual surface oil after six weeks in the other, with mixed results across the two measures.³ Expect skin to look less shiny through the day, not oil-free skin.
• Blotchiness looks calmer. In the 12-week study the niacinamide side also showed less red blotchiness. Niacinamide does not shrink pores or clear them the way a pore-clearing acid does.
• What it does not do. It does not remove pigmentation, cure breakouts, erase pores, or change your natural skin colour. If breakouts are the main concern, a formula built around pore-clearing ingredients fits the point better than niacinamide alone.

In the LNGVTY range, the serum that fits uneven tone and visible pores is the Dark Spots, Pore Control Serum, made for all skin types, in which niacinamide supports more even tone and pores that look less visible. Where excess oil through the day is the main complaint, the Acne, Blemish Control Serum, made for oily, combination and acne-prone skin, pairs niacinamide with salicylic acid that clears blocked pores, and its niacinamide supports less oil through the day and more even tone. In the dark-spots serum's own clinical study, 100% of patients improved dark spots in 8 weeks, measured in 36 Indian women aged 24 to 44 with twice-daily use, and results may vary. That is a result for the whole formula, not for niacinamide alone.

Who it suits, oily and dry skin included

Niacinamide suits many adults across skin types because it does not peel or bleach, and trials have tested it on both photoaged skin and melasma with sunscreen in place.¹² If your T-zone turns shiny by afternoon but your cheeks feel tight after washing, the two things can be true at once: skin can make plenty of oil and still be short on water. Niacinamide fits that combination because it helps the oily look while sitting comfortably under moisturiser.

That is not the same as suiting everyone. When a new serum stings, the cause is usually the full formula, the fragrance, an acid alongside it, or a tired barrier, rather than the percentage on the front. Introduce one product at a time and patch test first, especially with easily reactive skin or prescription treatments.

Which percentage to pick, 5% or 10%

The studies people quote used specific strengths: 5% in the 12-week split-face trial, 4% in the melasma trial, and 2% in the sebum trials.¹²³ A higher number on the label is not automatically better, and no study shows that 10% beats 5% for every face. Tolerance matters more than the number, so pick the serum whose full formula fits your concern and use it as directed.

How to use it, and what to pair it with

Niacinamide works morning or night, but the routine around it decides the result. Sunlight keeps making fresh pigment while any brightening step tries to soften old marks, so dermatologists place sunscreen as the starting point for dark spots and advise stopping any product that burns or stings on application.⁴⁵ The pairing question is really about tolerance, not a chemical clash: add one active at a time and do not stack several strong products at once.

1. Cleanse and leave skin slightly damp. A mild cleanser and lukewarm water, with no scrubbing. Damp skin helps the serum spread in a thin layer.
2. Apply the serum as the active step. With either LNGVTY serum, that means 3 to 4 drops on damp skin after cleansing. Each is built to be your only active, so no extra retinol, acids, or brightening serums are needed on top.
3. Moisturise. A plain moisturiser after the serum keeps skin comfortable, in humid weather and in air-conditioned rooms alike.
4. Protect every morning. Use a broad-spectrum sunscreen with SPF 30 or higher on all skin that clothing will not cover.⁴ If you use vitamin C in the same routine, add one at a time and keep whichever arrangement leaves skin calm.

If you already use salicylic acid, a retinoid, or a prescription treatment, do not layer everything together on day one. Start the niacinamide serum every other night if your skin reacts easily, and ask a dermatologist before adding anything new alongside tretinoin or clindamycin. If pregnant or breastfeeding, check with a doctor first, since the acne serum contains salicylic acid.

What to expect, and when something is wrong

Trials that showed change ran for eight to twelve weeks, so judge the look of tone and shine after eight to twelve weeks.¹² Stopping does not darken skin on its own, but marks can look worse again when sun protection lapses, because sunlight restarts the same pigment process.

• Mild flushing, warmth, or light stinging. Pause the serum for a few nights, keep cleanser, moisturiser, and sunscreen, then restart less often once comfort returns.
• Burning that lingers, swelling, or a rash. Stop the product and do not push through. Dermatologists advise stopping any skincare product that burns or stings when applied.⁵
• New painful, sudden, or scarring breakouts. See a dermatologist rather than raising the percentage. Persistent or severe changes deserve professional review, not a stronger serum.⁴

Frequently asked questions

References

1. Bissett DL, Oblong JE, Berge CA. Niacinamide: a B vitamin that improves aging facial skin appearance. Dermatol Surg. 2005;31(7 Pt 2):860-865. Available at: pubmed.ncbi.nlm.nih.gov/16029679.
2. Navarrete-Solis J, Castanedo-Cazares JP, Torres-Alvarez B, et al. A double-blind, randomized clinical trial of niacinamide 4% versus hydroquinone 4% in the treatment of melasma. Dermatol Res Pract. 2011;2011:379173. Available at: PMC3142702.
3. Draelos ZD, Matsubara A, Smiles K. The effect of 2% niacinamide on facial sebum production. J Cosmet Laser Ther. 2006;8(2):96-101. Available at: pubmed.ncbi.nlm.nih.gov/16766489.
4. American Academy of Dermatology. How to fade dark spots in darker skin tones. Sunscreen as the starting point for dark spots, stopping products that burn or sting, and seeing a dermatologist when treatment fails. Available at: aad.org/fade-dark-spots.
5. American Academy of Dermatology. Melasma: self-care. Daily sun protection and stopping any skin care product that burns or stings. Available at: aad.org/melasma-self-care.

This article is for general information and is not medical advice. Patch test new skincare products, wear sunscreen daily when caring for uneven tone, and consult a qualified dermatologist for persistent, painful, sudden, or severe skin changes, and for use during pregnancy or breastfeeding or alongside prescription treatments.