Niacinamide has become one of the star ingredients in skincare, and it's no coincidence: it's one of the few active ingredients that combines efficacy backed by clinical studies with excellent tolerability, even on sensitive skin. If you've wondered what it's for exactly, what concentration to look for, or if you can combine it with your vitamin C serum, this guide will tell you clearly and rigorously, with the calm your conscious beauty routine deserves.
What is niacinamide and what is it for?
Niacinamide (also called nicotinamide) is one of the two forms of vitamin B3. In cosmetics, it is used topically because it participates in key skin processes: it helps produce ceramides and other lipids that make up the skin barrier, is involved in cell energy, and has antioxidant and calming action. In short, it helps strengthen the skin from its structure, not just to treat a specific symptom.
The interesting thing is that it is a multi-function ingredient: a single molecule that acts on hydration, tone, pores, and signs of aging. That's why it fits well in routines for oily, acne-prone skin as well as in anti-aging treatments for mature skin.
Science-backed benefits of niacinamide
This is the part we like the most, because niacinamide is one of the cosmetic active ingredients with the most scientific literature behind it. These are its best-documented benefits.
1. Strengthens the skin barrier and improves hydration
Niacinamide stimulates the synthesis of ceramides, free fatty acids, and cholesterol in the epidermis, the "bricks" that keep the skin sealed and hydrated. The result, confirmed in clinical trials, is a stronger barrier, less transepidermal water loss, and more comfortable and resilient skin. It is especially useful if you notice tightness, sensitivity, or dehydration.
2. Evens out tone and helps with dark spots
One of its most valued effects is on hyperpigmentation. Niacinamide reduces the transfer of melanosomes (pigment packets) from melanocytes to surface cells, resulting in a more even tone and less visible spots with continued use. In studies, concentrations around 5% showed a significant reduction in hyperpigmented areas.
3. Controls sebum and minimizes the appearance of pores
An almost exclusive benefit of this active ingredient: research shows that topical niacinamide reduces sebum production and the apparent size of pores. A significant decrease in the sebaceous excretion rate was observed even at 2%. This is why it is a great ally in summer, when heat and sweat increase shine, and in acne-prone skin.
4. Reduces signs of aging
The classic study by Bissett et al. (2004-2005) applied 5% niacinamide to one side of the face for 12 weeks in women with photoaging, compared to the vehicle on the other half. The treated side showed significant improvements in fine lines and wrinkles, spots, diffuse redness, sallowness, and elasticity. A good reminder that consistency, rather than immediacy, is what yields results.
How to use niacinamide in your routine
Niacinamide is generous: it tolerates most combinations well and can be used morning and night. Even so, getting the most out of it has its technique.
- Order: on clean skin and, if you use toner, after it. Apply niacinamide serum before thicker moisturizers and oils (from lightest to richest texture).
- Frequency: suitable for daily use, morning and/or night. If your skin is very reactive, start once a day.
- Amount: a few drops are enough. More product does not mean more results.
- Sun protection: in the daytime, always finish with your sunscreen, especially if you are treating dark spots.
What is the best concentration of niacinamide?
Most of the studied benefits appear in the range of 2% to 5%, and up to 10% in some trials. To start, a concentration of 4-5% offers an ideal balance between efficacy and tolerability. Very high formulas (above 10%) do not necessarily provide more benefit and, in sensitive skin, can cause redness or itching. In natural cosmetics and well-designed formulations, what matters is not only the percentage, but the quality of the complete formula.
Niacinamide and vitamin C: can they be used together?
Yes, absolutely. For years, the myth circulated that niacinamide and vitamin C "canceled each other out" or caused redness when mixed. This fear came from a 1960s study that combined pure forms of both molecules under extreme laboratory conditions (high heat, very low pH, long times), nothing like how we use cosmetics at home.
Current dermatology confirms that they work wonderfully together: vitamin C provides its powerful antioxidant and brightening action, while niacinamide strengthens the barrier and evens out tone. In fact, many modern formulas purposefully combine them in the same product to boost luminosity and correct dark spots.
What skin type is niacinamide for?
Practically all of them. It is one of the most versatile and best-tolerated active ingredients:
- Oily and acne-prone skin: due to its sebum control and its effect on pores.
- Sensitive or reactive skin: due to its soothing and barrier-repairing action.
- Skin with dark spots: to work on evening out the tone.
- Mature skin: as anti-aging support, alone or with other active ingredients like bakuchiol or retinal.
Niacinamide in natural cosmetics: our selection at Biovardi
In our collection of facial serums you will find formulas that incorporate niacinamide combined with other active ingredients of natural origin. If you are looking for a gentle anti-aging approach, the serum with bakuchiol and niacinamide combines "natural retinol" with vitamin B3 to improve lines and firmness without irritation. And if your priority is dark spots and luminosity, the Unify serum with vitamin C and niacinamide works on hyperpigmentation and dull tone. You can explore more options in the dark spots and pigmentation collection according to your needs.
And remember: if you have questions about how to integrate niacinamide into your routine or combine it with other active ingredients, at Biovardi we offer free pharmaceutical advice. Conscious beauty is also about choosing well and calmly.
Frequently asked questions about niacinamide
How long does niacinamide take to work?
The first signs (more comfortable and hydrated skin) can be noticed in 2-4 weeks. For visible results on dark spots, pores, or fine lines, consistent use for at least 8-12 weeks is recommended, which is the duration of major clinical studies.
Can niacinamide be used every day?
Yes. It is suitable for daily use, morning and night. If your skin is very sensitive, start with one application a day and increase as tolerated.
Niacinamide or retinol?
They are not rivals; they are complementary. Retinol (or its natural alternative, bakuchiol) acts on cell renewal, while niacinamide calms, strengthens the barrier, and reduces possible irritation. Used together, they enhance each other.
Does niacinamide help with acne?
It helps as support, thanks to its sebum control, its effect on pores, and its anti-inflammatory action. It does not replace medical treatment in cases of moderate to severe acne, but it is a good ally in the daily routine.
Can I combine niacinamide with hyaluronic acid?
Yes, it's an excellent combination: hyaluronic acid attracts water to the skin and niacinamide helps retain it by strengthening the barrier. Together, they improve hydration and the feeling of comfort.
In summary
Niacinamide is that rare ingredient that does many things well and almost never bothers: it strengthens the barrier, moisturizes, evens out tone, controls shine, and contributes to anti-aging, all with an excellent tolerability profile and solid scientific backing. If you are going to incorporate a single new active ingredient into your natural cosmetics routine, it is a safe bet. And, as always, consistency is your best ally.
References
- Mechanistic Basis and Clinical Evidence for the Applications of Nicotinamide (Niacinamide) to Control Skin Aging and Pigmentation. Int J Mol Sci, 2021 (PMC).
- Mechanistic Insights into the Multiple Functions of Niacinamide: Therapeutic Implications and Cosmeceutical Applications. 2024 (PMC).
- Bissett DL, et al. Niacinamide: A B vitamin that improves aging facial skin appearance. Dermatol Surg, 2005 (PubMed).
- Bissett DL, et al. Topical niacinamide reduces yellowing, wrinkling, red blotchiness, and hyperpigmented spots in aging facial skin. Int J Cosmet Sci, 2004.
- Can You Safely Use Vitamin C and Niacinamide Together? Healthline (reviewed by dermatology).