Niacinamide: Everything a Dermatologist Really Wants You to Know

Niacinamide is everywhere—on TikTok, in skincare products, and on beauty blogs. But there’s often a huge gap between marketing claims and clinical reality. As a dermatologist, I’ve seen patients misuse it, give up on it too soon, or combine it with ingredients that cancel out its effects. This guide tells the truth about niacinamide—no filters, no jargon.

What exactly is niacinamide?

Niacinamide, also known as vitamin B3 or nicotinamide, is a water-soluble vitamin that plays a key role in cellular metabolism. It has been used in cosmetics since the 1990s, but it wasn’t until the 2010s that clinical studies began to thoroughly document its effects.

Unlike many active ingredients that are subject to fleeting trends, niacinamide is backed by a robust and reproducible body of clinical research. That is why it is one of the few cosmetic active ingredients I consistently recommend.

The 5 clinically proven benefits

1. Reduction in visible pores — Niacinamide regulates sebum production and improves skin elasticity around the pores. Studies: visible reduction after 4 to 8 weeks at a 5% concentration.

2. Even skin tone — It inhibits melanin transfer, gradually reducing hyperpigmentation spots.

3. Anti-breakout action — By regulating sebum production and strengthening the skin barrier, it reduces the frequency of breakouts. Effective for mild to moderate inflammatory acne.

4. Redness relief — It inhibits certain inflammatory pathways, making it beneficial for sensitive skin and rosacea.

5. Improved elasticity — At 5–10%, it stimulates collagen production — particularly beneficial for those aged 30 and older.

At what concentration?

The answer: between 2% and 5%. Below 2%, the effect is too weak. The ideal concentration for most skin types is 5%—this is the most well-documented concentration and offers the best balance of effectiveness and tolerability. This is precisely the concentration used in Ritual 02—Niacinamide & Biotech VIBRE Serum.

What to pair it with—and what to avoid

Niacinamide is one of the most compatible active ingredients. It works well with stable vitamin C, ceramides, peptides, hyaluronic acid, and PHAs. Avoid using it at the same time as strong acids in high concentrations—there’s no chemical incompatibility, but the pH levels differ. Apply them at separate times to maximize the effectiveness of each.

Morning or evening?

Both. Niacinamide is stable in light and heat. It does not increase sun sensitivity, so it can be used morning and night without restriction. Our biomimetic serum contains 5% niacinamide—formulated specifically for this dual window of effectiveness.