The Ordinary Niacinamide 10% + Zinc 1%

Maria Alejandra has not used this product herself, so there are no wear or results claims here. This is an independent formulation analysis: we read the full INCI list, check the disclosed active concentration and vehicle, and cross-check each active against peer-reviewed dermatology literature and the consensus positions of dermatology bodies. We note fragrance and common sensitizers, packaging suitability for light- or air-sensitive actives, and price per use. Claims the brand has not substantiated are reported as claims. Nothing here is sponsored or gifted, and no commission changes a verdict.

Niacinamide 10%

Above the 2–5% used in most published barrier and sebum studies. Higher is not clearly better, and 10% raises the chance of a warm flushing response in sensitive skin.

Zinc PCA 1%

Included for sebum regulation. Evidence is modest; it also contributes to the formula's slightly tacky feel.

Thin, water-light, and mildly tacky as it dries. Layering it under a heavy cream or a silicone-rich SPF can cause pilling, which is the most common complaint about this product.

If this one is not the right fit, these are the products I would look at next, and the reason for each.

Paula's Choice 10% Niacinamide Booster

A better-buffered niacinamide if 10% leaves your skin flushed or grainy-feeling.

Vichy Minéral 89 Hyaluronic Acid Booster

If what you actually want is a light hydrating layer rather than an oil-control active.

These are the recurring criticisms in published customer reviews, with what the formula explains about each one.

It pills under my sunscreen.

This is the most common complaint and it is a formulation trait. The serum dries tacky, and silicone-heavy sunscreens roll on top of that film. Use two or three drops on damp skin, wait a full 60 seconds, then press the next layer on instead of rubbing.

It made my face red and hot.

Niacinamide flushing is dose-related, and 10% is roughly double what most published barrier studies use. That reaction is not an allergy in most cases — it usually resolves on a 4-5% product at the same benefit level.

It broke me out.

The formula is oil-free and non-comedogenic by composition, so breakouts here are usually from stacking it with other actives or from the tacky layer trapping heavier products above it. Simplify the routine for two weeks and reintroduce it alone.

It turned yellow / smells off.

The dropper design lets air into the bottle at every use. Color drift over months is oxidation of the formula, not contamination, but it is a sign to replace the bottle.

I saw no change in my dark marks.

Niacinamide works slowly on post-inflammatory pigmentation — published timelines run eight to twelve weeks, and only alongside daily sunscreen. Without SPF, new pigment outpaces anything a serum can fade.

1. 1A few drops on clean, dry skin before heavier serums and moisturizer.
2. 2Once daily to start; twice only if you have no flushing.
3. 3If it pills, apply to damp skin and wait 60 seconds before the next layer.

Morning, after cleansing and before moisturizer and SPF; or at night before a retinoid, where it helps reduce irritation.

Is 10% niacinamide too strong?

For many people, yes. Most research on barrier function and sebum sits at 2-5%. Ten percent is not more effective in a way studies show, but it does raise the odds of flushing and stinging, especially on rosacea-prone skin.

Can you use niacinamide with vitamin C?

Yes. The old warning came from a 1960s study on raw ingredients under heat, not on modern formulas. If you get flushing, apply vitamin C in the morning and niacinamide at night.

Why does The Ordinary niacinamide pill?

The zinc and the water-thin base dry to a slightly tacky film that silicone products slide over. Fewer drops, damp skin, and a 60-second wait before the next layer solves it for most people.

Can I use it with retinol?

Yes, and it is a useful pairing — niacinamide applied first can reduce the irritation of the retinoid that follows. Let each layer settle before applying the next.

How long before it works?

Oil control is often noticeable within two to four weeks. Post-acne marks take eight to twelve weeks and require daily sunscreen to hold the gain.

Is it safe during pregnancy?

Niacinamide is generally regarded as pregnancy-safe and is a common substitute for retinoids and high-strength acids. Check with your own doctor about your full routine.