Niacinamide has become a popular ingredient in acne skincare because it addresses several concerns at once: inflammation, excess oil, skin barrier health, and the appearance of post-acne marks. It’s also generally well tolerated by many skin types.
Here are the main reasons it’s widely used:
- Helps calm inflammation. Niacinamide (a form of vitamin B3) has anti-inflammatory properties that can reduce the redness and swelling associated with acne, particularly inflammatory pimples.
- May reduce oil production. Some studies suggest that niacinamide can help regulate sebum (oil) production, which may make skin appear less shiny and contribute to fewer clogged pores in people with oily skin.
- Strengthens the skin barrier. It supports the production of ceramides and other lipids that help maintain the skin’s protective barrier. A healthier barrier is better able to retain moisture and is less prone to irritation—especially important if you’re also using acne treatments like retinoids or benzoyl peroxide.
- Can fade post-acne marks. Niacinamide may help reduce post-inflammatory hyperpigmentation (the dark marks left behind after acne heals) by slowing the transfer of pigment to skin cells. It won’t remove scars, but it can improve the appearance of discoloration over time.
- Works well with other acne ingredients. Niacinamide is commonly combined with ingredients such as:
- Adapalene or other retinoids
- Benzoyl Peroxide
- Salicylic acid
- Azelaic acid
Because it’s generally gentle, it can help offset some of the irritation that stronger acne treatments may cause.
What the evidence says
Research suggests that topical niacinamide can:
- Reduce inflammatory acne lesions.
- Improve skin barrier function.
- Decrease excess oil in some people.
- Lighten post-inflammatory hyperpigmentation with consistent use.
However, niacinamide is usually considered a supportive ingredient, not a standalone treatment for moderate or severe acne. If you have persistent or cystic acne, medications such as topical retinoids, benzoyl peroxide, or prescription therapies are often more effective at preventing new breakouts.
How to use it
- Products containing 2% to 5% niacinamide are effective for many people.
- Higher concentrations (such as 10%) are widely available, but they aren’t necessarily more effective and may increase the chance of irritation in some individuals.
- It can be used once or twice daily, typically after cleansing and before moisturizer.
- Daily sunscreen is recommended, especially if you’re treating post-acne marks, since sun exposure can make discoloration last longer.
Overall, niacinamide is popular because it’s versatile: it helps calm active acne, supports the skin barrier during treatment, and improves the appearance of post-acne discoloration, making it a useful addition to many acne skincare routines.
