Niacinamide: The active ingredient that strengthens the skin barrier

Niacinamide has established itself as one of the most popular active ingredients in skincare, and for good reason: it’s a true Swiss Army knife—both effective and remarkably well-tolerated. Among its many qualities, one stands out: its ability to strengthen the skin barrier.

Niacinamide is a versatile active ingredient that strengthens the skin barrier, evens out skin tone, soothes redness, and smooths the skin, while being suitable for almost all skin types. Here's what it actually does, and who it's intended for.

What is niacinamide?

Niacinamide, also known as nicotinamide, is a form of vitamin B3. It is water-soluble and is known for its high stability and excellent tolerability, even for sensitive skin. It also has the advantage of blending well with most other active ingredients, making it easy to incorporate into a skincare routine.

It is this combination of gentleness, stability, and versatility that explains its inclusion in a wide range of skincare products, from serums to creams to exfoliants.

What does niacinamide do for the skin?

Its reputation as a multi-action ingredient is well-deserved: niacinamide works on several fronts at once.

Its most distinctive effect is on the skin barrier: it stimulates the synthesis of ceramides—the essential lipids of the stratum corneum—which helps the skin retain moisture more effectively, limit transepidermal water loss, and become more resilient. It also helps even out skin tone by limiting the transfer of melanin to surface cells, which helps reduce the appearance of pigmentation spots. Clinical studies have also shown that it smooths the skin by reducing the appearance of fine lines and improving elasticity, and that it soothes redness and irregularities, making it particularly beneficial for reactive skin. Finally, it helps regulate sebum production, which is beneficial for skin prone to oiliness or breakouts.

For what skin types?

Thanks to its mildness and versatility, niacinamide is suitable for virtually all skin types. It is particularly beneficial for sensitive or reactive skin, uneven complexions, blemish-prone skin, and those looking to strengthen their skin barrier.

This is also why it is often combined with more potent active ingredients, such as exfoliating acids: by supporting the skin barrier and reducing sensitivity, it allows you to benefit from their effectiveness while maintaining the skin’s comfort.

Niacinamide in PERS Skincare Products

At PERS, niacinamide is used in two complementary skincare products. The PERS Eye Cream combines it with hyaluronic acid, peptides, and arnica to brighten the eyes and revitalize the eye area, a thin and delicate zone.

The PERS Triple Exfoliator contains 5% niacinamide, specifically to strengthen the skin barrier and reduce sensitivity during exfoliation. This is what allows this treatment to stimulate cell renewal while remaining gentle, even on sensitive skin. Here are two concrete examples of this active ingredient’s versatility.

Key Takeaways

Niacinamide, a form of vitamin B3, is an active ingredient that is both gentle and versatile. Its key benefit is strengthening the skin barrier by stimulating ceramides, but it also evens out the complexion, reduces the appearance of dark spots, smooths the skin, soothes redness, and regulates sebum production. Well-tolerated and compatible with most active ingredients, it is suitable for almost all skin types and proves invaluable—either on its own or in combination with other ingredients—for healthier, more comfortable, and more even-toned skin.

Scientific Sources