Does Niacinamide Really Cause Purging? We Tested The Ordinary Serum

Myth Busted

That initial breakout might not be what you think—we put the biggest niacinamide myth to the test.

Expert Analysis · Honest Reviews · Real Results

1.🧪The Purging Lie

Got three new pimples two days after starting niacinamide. Classic purge, right? Wrong.

That’s irritation, not purging. Niacinamide doesn’t speed up cell turnover—so it can’t cause a purge. The myth is everywhere.

2.❓The Serum, Deconstructed

The Ordinary Niacinamide 10% + Zinc 1%. $6.50. The claim? Oil control and clarity without drama.

It’s cheaper than your oat milk latte.

Lab bottle, dropper, zero frills.

A 10% dose of the brightening, calming star ingredient.

Photo: Ilia / Unsplash

3.⚠️What’s Actually In It

It’s a short list. The 10% niacinamide is high—most brands use 2-5%. The zinc is for oil.

But that high percentage is also why some skin freaks out.

4.🔍The Feel & The Reality

Weird texture. Sticky, water-slash-glue. Absorbs in 20 seconds but leaves a faint film.

Week 2: My T-zone was noticeably less oily by 3 PM. Surprise? It pills under sunscreen if you rub.

💡

One Thing: Apply to bone-dry skin, wait 90 seconds, then do moisturizer. Cuts the pilling by 80%.

Photo: Anthony / Unsplash

5.✅Who It’s Really For

After a month, my oil slick was halved. Pores looked tighter. Zero brightening on my old acne marks, though.

✅

Buy if

You have truly oily, resilient skin that can handle 10%.

⏭️

Skip if

Your skin is sensitive, dry, or reactive. Start with 5%.

💰

Worth it?

For $6.50, it’s a no-brainer test for oil control.

6.💡Final Call

It’s a brilliant, cheap oil-controller. But it’s not a gentle all-rounder—and that “purge” is your skin saying no.

7.5/10

A potent, fussy tool for the oily.

🛍️

Where to Buy: Sephora or the brand site. Patch test behind your ear for three days first.