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

How to Perform K18REPAIRâ„¢ in Every Service

Top celebrity stylists break it down step-by-step for better, longer-lasting salon results—every time. Read More
/ hair science

The Truth Behind Tangles

Plus, the science-backed routine for smooth hair inside + out. Read More
/ build your business

4 ways K18REPAIRâ„¢ builds your salon business

Why top stylists trust this exclusive service to deliver results and keep clients coming back. Read More
/ build your business

step into our NEW K18 virtual salon game

Try K18REPAIRâ„¢ in different services, prep for certification, get exclusive education, and more. Read More
/ hair science

Can Dull Hair Be Fixed?

The science behind reviving shine from the inside. Read More
/ hair stories

How I Use Wigs to Push the Limits of Expression

Beauty engineer, Alfred Lewis III, gives us an exclusive look at his self-care routines and holistic approach to beauty. 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...