Dennis Gebhart Bio

The Master Chemist

Dennis Gebhart

Industry Icon. Author. Mentor.
Partnering with Sustainable Glam to elevate hair color education.

Dennis Gebhart

40 Years of Mastery

Dennis Gebhart is not just an educator; he is a "teacher of teachers." A protégé of hair color pioneer Sam Lapin, Dennis has spent over four decades dissecting the chemistry of hair color to help stylists understand the why behind the how.

Career Highlights
  • Global Influence: Collaborated with industry icons in 17 countries.
  • Product Architect: Helped develop some of the world's most renowned color lines.
  • Salon Owner: Operates Hair Color Guru in Southern California, keeping his skills sharp and authentic.
Guru Nation Logo

What is Guru Nation?

Founded by Dennis in 2014, Guru Nation is a brand-neutral educational institution. It rejects marketing fluff in favor of hard chemistry and physics.

Whole Brain Learning

"Tell me and I forget, involve me and I learn." Our method ensures you retain the knowledge.

Virtual & Live

From our Montclair, CA training center to our state-of-the-art Virtual Classroom.

The Handbook for the Modern Colorist

Captain Color vs. The Pigment Pirates

Forty-plus years of lessons packed into one easy-to-read guide. Dennis challenges the belief systems and marketing stories that have confused colorists for ages. It's time to rock the boat and confront the misinformation.

Get the Book
Captain Color Book Cover