The Zenvy Journal

Curl science,
tested and written down.

Practical guides for every curl pattern, plus the product testing behind what we stock. Written in the UK, for UK water, weather and hair.

3 articles · Guides & Research · Updated July 2026

Hair Oils for Curls: The Lightweight / Heavyweight Map

Penetrating versus sealing oils, the molecule-size table, and how to match every common oil to your curl type and porosity. The Zenvy guide.

3 articles

The wet-stretch test, over-protein vs under-protein symptoms, and a protein-by-porosity schedule — the diagnostic guide most curly hair advice skips.

Glycerin works between 40-60F dew point. Below 30F it pulls water out of your hair. Above 75F it creates frizz....