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

What Are Fusion Proteins?

And how K18 uses them to create never-before-seen benefits optimized for your hair’s biology. Read More
/ hair stories

How Eco-Friendly Daily Practices Improve My Hair + Lifestyle

Chief Operating Officer of Ecoheads, Cortney Thomson, shares her sustainable approach to beauty. Read More
/ synthetic biology

How Genome Mapping Works in Synthetic Biology

What is genome mapping and how does it fuel the formulation of more effective beauty products—sustainably? Read More
/ hair science

Why Less Is More for Your Hair + the Planet

How K18’s intentional formulation means fewer ingredients, fewer steps, and fewer resources required. Read More
/ hair science

What Causes Hair + Scalp Odors

Discover the science-backed ways to keep them at bay 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...