About Ozerla
A lab that writes everything down.
Ozerla started in 2021 as two chemists and a notebook in Istanbul. The notebook is now public — that’s the whole idea.
Why we started
Labels were the problem.
We kept seeing the same thing: a hero ingredient on the front of the bottle, and no way of knowing whether it was at 10% or 0.01%. ‘Proprietary blend’ meant ‘trust us’.
So we built a brand around the opposite. Every active above 0.1% is printed with its percentage. Every change is logged with a reason. Every batch is tested and published under its number.
It makes us slower. It also means you can compare our serum to anyone else’s — and we’re fine with that.
Timeline
Five years, one notebook.
Two chemists, one bench in Kadıköy. First formula: Barrier Serum v1.
Ingredient Index goes online with 18 cards.
First independent SPF test. Mineral Fluid launches.
Glass return programme; 41,000 bottles reused so far.
Routine builder, public batch logs, 64 index cards.
The people
Small on purpose.
DA
Deniz Arslan
Co-founder · Formulation chemist
Writes every formula and every change log entry.
SK
Selin Kaya
Co-founder · Quality & testing
Runs the batch tests and publishes the numbers.
MO
Mert Özdemir
Customer care
Answers the questions the labels don’t.