So a brand born in a Dublin kitchen wants to sell me niacinamide. Usually that story makes me roll my eyes — until I saw the ingredient list. This isn’t some watered-down herbal tea. Pestle & Mortar uses 10% pure niacinamide. No fluff. No fragrance masking the formula.
The real flex? It’s pH-balanced to 5.5. Most niacinamide serums sting because they’re too alkaline. This one doesn’t.
🇮🇪 **What You’re Actually Buying**
It’s $44 for 30ml. The claim that got me: “farm-to-face” science. I’m skeptical of anything that sounds like a farmer’s market slogan — but the numbers check out.
1. **10% Niacinamide** — Clinical dose. Not marketing.
2. **Zinc PCA** — Controls oil without stripping. This combo actually works.
3. **Hyaluronic Acid** — Low molecular weight. Penetrates deeper than the cheap stuff.
🧪 **The Ingredients That Matter**
Two actives doing the heavy lifting here. Niacinamide at 10% shrinks pores and evens tone over 8-12 weeks. Zinc PCA keeps sebum in check without that tight, dry feeling. They also added allantoin — weirdly smart. It calms the irritation niacinamide can cause in some people.
– Niacinamide: Pore size reduction + texture smoothing
– Zinc PCA: Oil regulation without dehydration
– Allantoin: Anti-irritation buffer
– Hyaluronic Acid: Hydration delivery
📖 **Texture & Two-Week Check-In**
Watery. Almost runny. Absorbs in about 8 seconds — no joke. No pilling under sunscreen. First few days I thought it was doing nothing. That’s normal.
Week two: my T-zone stopped looking like a grease slick by noon. Unexpected win — the redness around my nose faded. I did not expect that from a niacinamide serum.
💡 *Apply to damp skin. Seriously. It spreads better and you use half as much.*
🌿 **Real Results (No Hype)**
After three weeks: pores on my nose are visibly smaller. Not gone — smaller. Oil production dialed back about 40%. No breakouts. No irritation. The dark spots from last summer’s sun damage? Still there, but less angry.
✅ **Buy if** — You have oily or combination skin and want a no-BS active that won’t irritate
⏭️ **Skip if** — You’re on prescription retinoids. Too many actives will wreck your barrier.
💰 **Worth it?** — $44 for 30ml. You use 3 drops. That’s 3+ months. Yes.
🏆 **Final Verdict**
A rare case where the Irish origin story isn’t just marketing fluff — the formula is genuinely smart for the price.
9.2/10 *Clean, effective, no fragrance nonsense*
🛍️ **Where to Buy** — Direct from their site. They do 20% off first orders sometimes. Worth waiting for.