30-Day Honest Test: Does The Ordinary Niacinamide Serum Work?

30-Day Test
I used this viral serum for a month to see if it really clears pores and controls oil.
Expert Analysis · Honest Reviews · Real Results
1.🧪The Pilling Predicament

Day 3 and I almost quit. My makeup slid right off my face in little gray rolls.

The pilling was so bad I had to wash my face and start over. A viral serum shouldn’t make you late for work.

2.📅The Basics

It’s The Ordinary’s Niacinamide 10% + Zinc 1%. $6.90. The claim? Clear pores, control oil, calm redness. For that price, I had to see.

1

Texture

Water-based, slightly sticky serum.

2

Scent

None. It smells like… nothing.

3

Packaging

A glass dropper bottle that feels surprisingly expensive.

woman putting makeup in front of mirror

Photo: kevin laminto / Unsplash

3.🔍What’s In The Bottle

It’s a simple, targeted formula. The 10% niacinamide is a high dose for brightening and regulating oil. The 1% zinc helps with inflammation.

  • Niacinamide 10%: Regulates sebum, minimizes pores
  • Zinc PCA 1%: Anti-inflammatory, oil control
  • Tamrindus Indica Seed Gum: The texture agent that can pill
  • Pentylene Glycol: Hydration + helps other ingredients penetrate
man wearing mud mask

Photo: Rosa Rafael / Unsplash

4.📊The 30-Day Diary

Applies like water — absorbs in 10 seconds. Leaves a faint, tight film. Not moisturizing at all.

By week two, the pilling stopped. My skin had to adjust to the high concentration. Unexpected: it dried out a patch on my cheek. Had to double up on moisturizer.

💡

One Thing: Use ONE drop for your whole face. Seriously. More is not better, it’s just sticky.
assorted-color powders

Photo: Igor Rand / Unsplash

5.🤔Did It Actually Work?

My T-zone was noticeably less shiny by 3 PM. Pores? They looked tighter, but not invisible. Zero effect on existing blackheads. The redness around my nose faded.

Buy if
You have oily, resilient skin and want midday shine control.
⏭️

Skip if
Your skin is dry, sensitive, or you can’t be bothered with a careful routine.
💰

Worth it?
For $7, the oil control alone is a win.
6.Final Call

It’s a brilliant, fussy little product. Manages oil like a pro, but you have to follow its rules.

7.5/10
A cheap, effective taskmaster for oil.
🛍️

Where to Buy: Sephora or the brand site. Buy the smaller size first to test your skin’s tolerance.