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 Keep Bleached Hair Healthy, Featuring Marian

See how our Senior Director of Visual Brand Experience, Marian changes up her look without compromising her hair health. Read More
/ hair science

The Difference Between Types of Hair Repair

Not all haircare products are created equal. Here’s the ultimate guide to hair repair methods. Read More
/ products + routines

How To Strengthen Fine Hair For Extensions, Featuring Andrea

Learn how K18 educator + PRO stylist, Andrea keeps her fine hair resilient through extensions + bleaching services. Read More
/ products + routines

How To Fight Frizz + Support Aging Hair, Featuring Erin

Discover how Erin, our SVP of Global Retail Sales, supports aging hair + fights frizz and damage from extreme bleaching services. Read More
/ synthetic biology

how does synthetic biology work?

hint: it has a lot to do with harnessing the power of bacteria, like E. coli. Read More
/ products + routines

How To Protect Hair Color, Featuring Maram

See how Maram, our Senior Director of Consumer Engagement protects her color + hair health with K18. 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...