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

boost your salon’s bottom line with K18 at home

Turn one-time treatments into ongoing success with K18's salon-to-retail strategy. Read More

Announcing the Hair Freedom for All Scholarship Winners

What the PBA prize means for their careers Read More

2024's most-read hair science stories

From hydration to aging, catch up on the stories you were loving this year.   Read More

Introducing K18 x FRAMAR hair coloring foils

Our new limited-edition collaboration is for stylists–just like you. Read More

Charli xcx’s hairstylist gives good tour hair

Matt Benns’s hair story—how he got into the biz, how he met Charli, and how he keeps her hair looking brat. Read More

The best way to use hair oil

While there’s no exact “wrong” way, there is a better method. 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...