How much leave-in mask should you use?
A handy dosage guide for every hair type, density, and length. Read More
/ hair stories

Embracing My Grey Hair

Manhattan-based supermodel Fabienne Heymans shares her personal hair journey and the beauty she finds in aging. Read More
/ curls, curly-coily-care

Your Curly + Coily Hair Crash Course

Signs of damaged curls, the best protective styles + how to keep clients’ hair healthy in the salon with K18REPAIR™. Read More
/ products + routines

How to Deliver Healthier Hair With Every Transformation

K18REPAIRâ„¢ strengthens + reverses damage for better, longer-lasting salon results. Read More
/ hair science

How Fortification + Repair Are Different (And Why You Need Both!)

What these terms mean and how K18REPAIRâ„¢ delivers both for healthier hair through every transformation. Read More
/ build your business

Build Your Business Like a PRO With K18REPAIRâ„¢

How to make more money with every service and keep clients coming back by delivering healthier hair through every transformation. Read More
/ hair science

The Science of Heat Protection by Oil

How hot tools impact hair on the molecular level, the role of lipids, and the surprising way to prevent damage with biotech. Read More
contributors
Biochemist
Karl Schmieder

Karl is a biochemist + the CEO of MessagingLab, a company that works with other Scientists to help them tell their...

Scientist
Heleen Kibbelaar

Heleen holds a bachelor's and master's degree in (physical) chemistry from the University of Amsterdam and Utrecht University in the Netherlands....

Colorist
Aura Friedman

You name ‘em, Aura has colored their hair. From celebrities like Lady Gaga, magazines like Teen Vogue, and the...

Salon Owner
Christine Thompson

As a professional colorist at Spoke & Weal in Los Angeles, Christine specializes in corrective color, color change, and working...

Colorist
Linh Phan

Linh Phan, or as his loyal following calls him, BESCENE is an international educator, salon owner + CEO. Sharing his trend-spotting...

Scientist
Esther Olu

Esther Olu is an R&D formulation scientist, esthetician, educator, science communicator who is a passionate advocate for dispelling misinformation within the...