The 5% Rule: Why More Niacinamide Isn't Better

The Percentage War Nobody Asked For

Scroll through any skincare forum and you'll find it: the quiet arms race of niacinamide percentages. Ten percent used to be the benchmark. Then fifteen. Now some brands are pushing formulas at twenty percent or higher, as if the number on the label were the product's most important feature. It isn't. And if you've ever wondered why your skin felt tight, flushed, or inexplicably irritated after switching to a "stronger" niacinamide, the percentage war is likely to blame.

At Glaciara, we formulated our Niacinamide Gel Moisturiser at 5%. That was a deliberate choice — not a compromise, not a cost-cutting measure. Here's the reasoning behind it.

What Niacinamide Actually Does

Niacinamide — also known as vitamin B3 — is one of the most versatile actives in contemporary skincare. At effective concentrations, it helps regulate sebum production, visibly minimises the appearance of pores, supports the skin's barrier function, and works to even out skin tone over time. It's water-soluble, stable across a wide pH range, and plays remarkably well with other actives. There's a reason it appears in so many well-regarded formulas.

But niacinamide's benefits are not linear. More does not simply mean more results. The relationship between concentration and efficacy plateaus — and beyond that plateau, higher percentages introduce a real risk of irritation, particularly for anyone with sensitive or compromised skin.

Where the Research Actually Points

The published literature on niacinamide is more nuanced than most brand marketing would suggest. Studies supporting niacinamide's positive effects on pore appearance, sebum control, and skin tone evenness have predominantly used concentrations in the 2% to 5% range. Some formulations have used up to 5% for specific concerns like hyperpigmentation and barrier repair — and the results are well documented.

What the research does not establish is a meaningful performance advantage for 10%, 15%, or 20% concentrations in everyday skincare. What it does flag, however, is a known side effect at higher doses: niacinamide can cause the formation of niacin (nicotinic acid) in the formula, particularly in unstable or poorly buffered products. Niacin is responsible for the characteristic skin flushing — the redness and warmth that some people mistakenly attribute to the product "working."

It's not working. It's irritating.

The 5% Sweet Spot — And Why We Chose It

When developing our Niacinamide Gel Moisturiser, the goal was a formula that delivers the well-documented benefits of niacinamide without pushing past the threshold where skin begins to push back. Five percent sits precisely in that window: effective enough to make a genuine difference over time, gentle enough and designed for daily use.

For a gel moisturiser intended for consistent, everyday use — not a targeted spot treatment — this matters enormously. The products that actually change your skin are the ones you use every single day without irritation, flaking, or second-guessing. A niacinamide gel moisturiser at 5% is one you can commit to long-term. A 20% formula is one you'll quietly abandon after two weeks.

There's also a formulation logic to consider. Niacinamide doesn't exist in a vacuum inside a formula. It interacts with every other ingredient around it. At 5%, niacinamide works alongside — rather than overpowering — the rest of the formula's functional ingredients. Our gel moisturiser is built as a complete skin solution, not just a niacinamide delivery vehicle.

Who Benefits Most from a Niacinamide Gel Moisturiser

A well-formulated niacinamide gel moisturiser at 5% suits a broad range of skin types and concerns:

• Oily and combination skin — the lightweight gel texture hydrates without heaviness, while niacinamide works to regulate excess sebum and reduce shine.
• Enlarged pores — consistent niacinamide use over weeks and months visibly reduces the appearance of pores by keeping them clear and minimising sebum congestion.
• Uneven skin tone — niacinamide interferes with the transfer of melanin to skin cells, gradually brightening areas of discolouration with regular use.
• Sensitive skin — particularly for those who find retinol or vitamin C too strong, a 5% niacinamide gel moisturiser offers meaningful active results with a more forgiving tolerance profile.
• Anyone using other actives — niacinamide is one of the few ingredients that, for most skin types, layers safely with vitamin C, AHAs, peptides, and retinol without requiring a complicated multi-step schedule.

If you're building a minimal, high-performance routine, a niacinamide gel cream makes an intelligent final step — sealing in the work done by serums while delivering its own active contribution.

The Glaciara Formula: What Else Is in It

A 5% niacinamide gel moisturiser is only as good as the formula surrounding that active. Ours is COSMOS Natural certified and manufactured in Latvia under strict EU cosmetics regulations — no synthetic fragrances, no parabens, no silicones.

Beyond niacinamide, the formula is built around ingredients that genuinely support the skin's barrier and hydration levels. The gel texture is deliberately lightweight — it absorbs quickly, leaves no residue, and works as a comfortable daily moisturiser whether you're using it alone or as the final step in a multi-product routine.

The result is a niacinamide gel cream that functions as a complete moisturiser, not merely an active-delivery product in moisturiser's clothing.

The Problem With Chasing Numbers

Skincare marketing has a long history of using concentration figures as a proxy for efficacy — and in some cases, that relationship holds. But for many actives, including niacinamide, the effective range is narrower than brands would have you believe. Pushing concentrations past what's necessary doesn't give you better results. It gives you a more dramatic label claim and, potentially, a more irritated face.

The smarter question to ask of any product isn't "how much does it contain?" It's "how well does it work, for whom, and at what cost to skin tolerance?" Those are the questions that lead you to formulas you'll actually benefit from — not just buy once and abandon.

Five percent is not a compromise. It's a considered position, grounded in what the evidence actually supports and what consistent, real-world use requires.

Where the Niacinamide Gel Moisturiser Fits in Your Routine

Used consistently, a niacinamide gel moisturiser at 5% delivers cumulative benefits that become more visible over weeks and months: refined texture, more even tone, a noticeable reduction in shine without dryness. It's a closer-to-finish product — applied after serums, before SPF in the morning, or as the final step in an evening routine.

If you're building or refining your approach, The Routine walks through how to layer Glaciara's five products in a sequence that makes sense. The niacinamide gel moisturiser functions cleanly as the final step — compatible with every other product in the line, including the Vitamin C Serum and the Peptide Anti-Aging Serum.

No percentage arms race required.