Niacinamide: what it is for and how to use it

Niacinamide is one of the most common ingredients in modern skincare. It can help with the skin barrier, redness, texture, sebum, and blemishes, but it works best when used with realistic expectations and as part of a well-tolerated routine.

Summary in 60 seconds

• Niacinamide , also called nicotinamide , is a form of vitamin B3 used in topical products such as serums, creams, and lotions. It’s not a «miracle ingredient,» but it has a practical advantage: it’s generally well-tolerated and can fit into simple skincare routines.
• Its best-supported benefits include skin barrier support , improved indirect hydration , reduced water loss , support for skin with mild redness , help with sebum/shine , and a gradual contribution to the reduction of some dark spots . Clinical studies and reviews describe effects on ceramides, pigmentation, sebum, and visible signs of photodamage, although the magnitude of change is usually moderate and depends on the complete formula, consistency, and sunscreen use.
• To begin with, a concentration of 2–5% is usually reasonable. A higher percentage doesn’t necessarily mean better results. If you have sensitive skin, rosacea, eczema, or are prone to burning, or if you’re using retinoids/acids, it’s best to introduce it slowly.

What is niacinamide and why is it important?

Niacinamide is the amide form of vitamin B3. In cosmetics, it appears on the ingredient list as Niacinamide . It is different from niacin or nicotinic acid, a form of vitamin B3 that, when taken orally, can cause flushing in some people; this distinction is important because many questions about niacinamide arise from confusing the two forms.

In the skin, niacinamide is of interest because it acts on several fronts without being particularly aggressive: it supports barrier function, participates in cellular pathways related to energy and repair, modulates inflammatory signals, and may influence how pigment is distributed in the epidermis. DermNet summarizes its potential skin uses for acne, barrier function, water loss, hydration, redness, pigmentation, and photodamage, always with the caveat that not all uses have the same level of evidence. DermNet 2023

In a routine for the general public, its main value isn’t to «transform» the skin in days. Its value is more understated: it can be a supporting ingredient that makes the skin less reactive, more comfortable, and more even-toned over time.

How does it work? Simple explanation, no complicated physics

The skin functions like a wall. The cells are like bricks, and lipids—including ceramides—help form the “cement” that reduces water loss and protects against irritants. In studies, nicotinamide increased the synthesis of ceramides and other lipids in the stratum corneum, reducing transepidermal water loss in dry skin. Tanno 2000

It can also modulate inflammatory signals. This explains why some skin types with mild redness or a tendency to become irritated tolerate it well as a supportive ingredient. It is not a substitute for medical treatments for rosacea, dermatitis, eczema, or inflammatory acne, but it can complement routines recommended by a professional when the formula is suitable.

In cases of hyperpigmentation, niacinamide does not «lighten» the skin. Its most cited mechanism is the reduction of melanosome transfer, which involves the transfer of pigment packets from melanocytes to keratinocytes. In clinical studies, niacinamide reduced hyperpigmentation and improved luminosity compared to vehicle-only treatments, although the results depend on concentration, duration of treatment, sun protection, and type of hyperpigmentation. (Hakozaki 2002 , Navarrete-Solís 2011)

In oily skin, some studies with 2% niacinamide showed a reduction in sebum or shine in certain populations. This does not mean it «closes pores,» because pores don’t open and close like doors; it can improve their appearance by reducing shine, congestion, or texture. Draelos 2006

How to choose it and how to use it?

1. Choose the concentration according to your skin, not according to fashion.
For most people, 2–5% is a sensible range. It’s sufficient for many routines addressing barrier, sebum, texture, or uneven tone. Concentrations of 10% or higher are not required and may be unnecessary if your skin is reactive.

2. Verify the complete formula.
A well-formulated niacinamide cream or serum can be helpful; however, a formula with perfume, irritating alcohol, too many acids, or too many active ingredients can be bothersome, even if the niacinamide itself is well-tolerated. For sensitive skin, look for simple, fragrance-free products with a moisturizing texture.

3. Introduce it gradually.
Start by using it 3–4 nights a week for two weeks. If there is no burning, itching, irritation, or peeling, you can switch to daily use. It can also be used in the morning.

4. Practical order of application.

• Morning routine:

1. 1. Gentle cleaning, if needed.
   2. Niacinamide in serum or cream.
   3. Moisturizer, if your skin needs it.
   4. Broad spectrum sunscreen.

• Nighttime routine:

1. 1. Cleaning.
   2. Niacinamide.
   3. Moisturizing.
   4. Retinoid or other treatment only if you already tolerate it or it was indicated.

5. If you’re looking to improve blemishes, sunscreen is non-negotiable.
For dark spots and sun damage, niacinamide without sun protection is often insufficient. The American Academy of Dermatology recommends broad-spectrum, water-resistant sunscreen with SPF 30 or higher, along with shade and protective clothing when appropriate. AAD 2026

6. Give it time.
For radiance or barrier comfort, some people notice changes within a few weeks. For discoloration, texture, or tone, expect to see results in 8–12 weeks . If there is no improvement or if the problem worsens, don’t keep adding products: review your routine or consult a specialist.

Common mistakes

Using too many assets at the same time.
Niacinamide, vitamin C, retinoids, glycolic acid, salicylic acid, and a physical exfoliant in the same week can be too much for many skin types. Irritation doesn’t always mean «an active ingredient is ineffective»; sometimes it simply means the routine is overloaded.

Thinking that a higher percentage is better.
The skin doesn’t work like a concentration competition. A well-formulated 5% can be more effective than a poorly tolerated 15%.

Waiting for it to cure the acne.
Niacinamide may help with mild inflammation, shine, and skincare tolerance, but current clinical guidelines for acne prioritize treatments such as benzoyl peroxide, topical retinoids, topical antibiotics in appropriate combination, salicylic acid, azelaic acid, and other medications depending on severity. It should not replace medical treatment if painful acne, nodules, or scarring are present.

Use it for blemishes without sun protection.
In melasma, post-inflammatory hyperpigmentation, or sunspots, UV radiation and visible light can maintain or worsen the pigment. Niacinamide may offer some support, but consistent sun protection is essential.

Always blame niacinamide for irritation.
Sometimes the concentration is irritating. Other times it’s the combination: perfume, preservatives, acids, retinoids, excessive exfoliation, or an already damaged barrier. If there is persistent burning, discontinue use and simplify your routine.

When should I consult?

Consult a dermatology specialist if any of these situations appear:

• Intense burning, swelling, hives, blisters, or rapid worsening after using the product.
• Sunburn with blisters, fever, significant pain, or general malaise.
• Spots that grow, change shape, bleed, itch persistently, or have irregular borders.
• Melasma or spots that do not improve despite constant sun protection.
• Painful acne, nodules, cysts, scars, or significant emotional impact.
• Suspected photosensitivity: you burn unusually easily, take photosensitizing medications, or develop rashes after sun exposure.
• Skin with rosacea, eczema, contact dermatitis or a severely impaired barrier that does not tolerate basic products.

Frequently Asked Questions

Does niacinamide help with acne?

• It may be helpful as a supportive treatment for oily, shiny, or mildly inflamed skin. There are studies with topical nicotinamide in inflammatory acne, but clinical guidelines do not recommend it as a primary treatment for all cases. If acne is persistent, painful, or scarred, a medical evaluation is advisable. (Shalita 1995 , Reynolds 2024)

Can it be used every day?

• Yes, many people can use it daily. The key is tolerance. If your skin is sensitive, start a few times a week and increase according to your response.

Is it better to use it during the day or at night?

• It can be used at both times. During the day, it pairs well with moisturizer and sunscreen. At night, it can complement barrier repair routines or help the skin tolerate other active ingredients, as long as too many irritating products aren’t applied.

What concentration is suitable?

• To begin with, 2–5% is sufficient for most people. Higher concentrations may be helpful in some formulas, but they are not necessary to obtain benefits and may increase the risk of irritation in reactive skin.

Does it help with stains?

• It can help with uneven skin tone and mild hyperpigmentation, especially when combined with daily sun protection. For melasma, persistent dark spots, or marked post-inflammatory hyperpigmentation, a more comprehensive plan is usually required.

Can I use niacinamide with retinol?

• Yes, many routines combine niacinamide and retinoids. For sensitive skin, it’s best to introduce one first, observe your tolerance, and then add the other. If you experience flaking or burning, reduce the frequency and simplify your routine.

Is it advisable to take niacinamide capsules for skin problems?

• Not as a general cosmetic routine. Oral nicotinamide has been studied in specific medical contexts, such as the prevention of certain non-melanoma skin cancers in high-risk patients, but it does not replace photoprotection and should not be initiated without clinical guidance. Chen 2015 , BAD 2024

Bibliography and sources

• Tanno O, Ota Y, Kitamura N, Katsube T, Inoue S. Nicotinamide increases biosynthesis of ceramides as well as other stratum corneum lipids to improve the epidermal permeability barrier . Br J Dermatol. 2000;143(3):524-531. doi:10.1111/j.1365-2133.2000.03705.x.
• Draelos ZD, Matsubara A, Smiles K. The effect of 2% niacinamide on facial sebum production . J Cosmet Laser Ther. 2006;8(2):96-101. doi:10.1080/14764170600717704.
• Hakozaki T, Minwalla L, Zhuang J, Chhoa M, Matsubara A, Miyamoto K, et al. The effect of niacinamide on reducing cutaneous pigmentation and suppression of melanosome transfer . Br J Dermatol. 2002;147(1):20-31. doi:10.1046/j.1365-2133.2002.04834.x.
• Navarrete-Solís J, Castanedo-Cázares JP, Torres-Álvarez B, Oros-Ovalle C, Fuentes-Ahumada C, González FJ, 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. doi:10.1155/2011/379173.
• Bissett DL, Miyamoto K, Sun P, Li J, Berge CA. Topical niacinamide reduces yellowing, wrinkling, red blotchiness, and hyperpigmented spots in aging facial skin . Int J Cosmet Sci. 2004;26(5):231-238. doi:10.1111/j.1467-2494.2004.00228.x.
• 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. doi:10.1111/j.1524-4725.2005.31732.
• Shalita AR, Smith JG, Parish LC, Sofman MS, Chalker DK. Topical nicotinamide compared with clindamycin gel in the treatment of inflammatory acne vulgaris . Int J Dermatol. 1995;34(6):434-437. doi:10.1111/j.1365-4362.1995.tb04449.x.
• Wohlrab J, Kreft D. Niacinamide: mechanisms of action and its topical use in dermatology . Skin Pharmacol Physiol. 2014;27(6):311-315. doi:10.1159/000359974.
• Boo YC. Mechanistic basis and clinical evidence for the applications of nicotinamide (niacinamide) to control skin aging and pigmentation . Antioxidants (Basel). 2021;10(8):1315. doi:10.3390/antiox10081315.
• Marques C, Hadjab F, Porcello A, Lourenço K, Scaletta C, Abdel-Sayed P, et al. Mechanistic insights into the multiple functions of niacinamide: therapeutic implications and cosmeceutical applications in functional skincare products . Antioxidants (Basel). 2024;13(4):425. doi:10.3390/antiox13040425.
• Reynolds RV, Yeung H, Cheng CE, Cook-Bolden F, Desai SR, Druby K, et al. Guidelines of care for the management of acne vulgaris . J Am Acad Dermatol. 2024;90(5):1006.e1-1006.e30. doi:10.1016/j.jaad.2023.12.017.
• American Academy of Dermatology Association. Sunscreen FAQs . Rosemont, IL: American Academy of Dermatology Association; 2026 [cited 2026 Jul 6] .
• DermNet. Nicotinamide . DermNet NZ; 2023 [cited 2026 Jul 6] .
• Chen AC, Martin AJ, Choy B, Fernández-Peñas P, Dalziell RA, McKenzie CA, et al. A phase 3 randomized trial of nicotinamide for skin-cancer chemoprevention . N Engl J Med. 2015;373(17):1618-1626. doi:10.1056/NEJMoa1506197.
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