Professional Journal

Jan 06, 2026 / featured, hair science

How Does Hair Change As We Age?

The science behind what’s actually happening on your head over time. Plus, how to keep your healthiest hair going strong—today, tomorrow, and in th...

Dec 12, 2025 / people

the secret behind santa’s white beard? K18

Father Christmas breaks down his full healthy hair routine (because there’s no gatekeeping allowed on the North Pole).

Dec 01, 2025 / people

A Day in the Life of a Stylist During the Holidays

Plus, 5 tips for surviving (and thriving) through the busiest time of year

Nov 24, 2025 / people

How the K18 Team Is Keeping Their Hair Healthy This Holiday Season

Soft, strong, bouncy results for everyone

Nov 17, 2025 / products

What Does Stress Do To Your Hair?

From thinning to graying, dive into the science behind how emotional, mechanical, and environmental stressors are impacting you (plus, what you can...