Is 10% niacinamide better than 5%?

Not automatically. Much of the supportive research sits around 2–5%, and higher levels like 10% can feel like too much for reactive skin or cause pilling under other layers. More is not reliably better here.

Does niacinamide cause flushing with vitamin C?

This is a common myth based on old, high-heat lab reactions between niacinamide and niacin, not on how the two behave together in a finished, room-temperature cosmetic formula. Most modern formulas layer the two without issue, though a small number of people report temporary flushing and can simply separate them if that happens.

Who is niacinamide a good fit for?

Its combination of tolerability and a broad benefit profile makes it a reasonable fit for almost any skin type, including reactive or barrier-compromised skin that cannot tolerate stronger actives. It is also commonly used as a supporting ingredient in routines built around retinol or acids, since it does not add irritation risk.

Vitamin (cell-signalling)

Niacinamide

INCI: Niacinamide·Studied at 2–5% (up to 10%)·Moderate evidence

A stable, water-soluble form of vitamin B3 and one of the more reliable multitaskers on a label, studied for the appearance of an even tone, refined-looking pores and a supported-looking barrier. It is well tolerated across most skin types, does not need special packaging, and is one of the few actives commonly recommended for both morning and evening routines. Because it is inexpensive to formulate and pairs easily with most other ingredients, it shows up across a very wide range of products, from dedicated brightening serums to moisturizers and toners where it plays a supporting role.

Studied for

·The appearance of an even tone
·The look of refined pores and balanced shine
·The appearance of a supported, comfortable-looking barrier
·The look of reduced visible blotchiness with consistent use

How it’s thought to work

A precursor to skin coenzymes studied for association with the appearance of a more even, resilient-looking complexion; it is stable and plays well with almost everything. These coenzymes (NAD+ and NADP+) are involved in cellular energy processes tied to how skin cells function and repair, which underlies niacinamide’s studied association with barrier-related benefits alongside its more commonly cited tone and pore-appearance effects. Unlike many actives on this list, it does not require a specific pH or carrier system to perform, which is part of why it formulates so easily.

Landmark study· studied at 5%

Topical 5% niacinamide was linked to more even looking skin tone, softer looking lines, and less visible blotchiness after 12 weeks.

Niacinamide: A B vitamin that improves aging facial skin appearance. Dermatologic Surgery, 2005.

View on PubMed (PMID 16029679) ↗

Questions

Is 10% niacinamide better than 5%?: Not automatically. Much of the supportive research sits around 2–5%, and higher levels like 10% can feel like too much for reactive skin or cause pilling under other layers. More is not reliably better here.
Does niacinamide cause flushing with vitamin C?: This is a common myth based on old, high-heat lab reactions between niacinamide and niacin, not on how the two behave together in a finished, room-temperature cosmetic formula. Most modern formulas layer the two without issue, though a small number of people report temporary flushing and can simply separate them if that happens.
Who is niacinamide a good fit for?: Its combination of tolerability and a broad benefit profile makes it a reasonable fit for almost any skin type, including reactive or barrier-compromised skin that cannot tolerate stronger actives. It is also commonly used as a supporting ingredient in routines built around retinol or acids, since it does not add irritation risk.

Serums we’ve scored with Niacinamide

References

This dossier covers the efficacy evidence. For the safety and concern profile of Niacinamide, see PlainBody ↗, our sister site.