• Value: 17/20
• Ease of Use: 20/20
• Quality: 20/20
• Perceived Hair Health: 18/20
• Perceived Hair Fullness: 17/20

Total: 92/100

The PureWow100 is a scale our editors use to vet new products and services, so you know what's worth the spend—and what's total hype. Learn more about our process here.

“Fine” doesn’t begin to describe my hair. “Exquisite” works, but most stylists use other terms: “cotton candy-like,” “thin,” “wispy”—and, as one notably blurted after petting my head repeatedly, mid-consultation, “like a toddler’s hair that never grew up!”

I’ve been pushed all kinds of products to make my locks appear lusher, from extensions to shampoos, but it wasn’t until I heard California-based Highbrow Hippie’s approach that I decided to commit to a full hair routine overhaul. Led by hair colorist Kadi Lee and beauty entrepreneur/herbalist Myka Harris, the brand was dedicated not only to making hair look good, but also treating the root causes of damage, from scalp to strand. They also had an impressive backing—their hair serum has been lauded by Oprah, and their client roster includes Meghan Markle, Gwyneth Paltrow and Julia Roberts.

When the salon owners decided to launch their Root Replenish Active Growth Serum ($88) and Essential Wellbeing Complex (a daily supplement, $118), they even turned to the Pretty Woman herself to serve as a guinea pig, testing the products firsthand. “My hair gets put through a lot at work, and I am amazed it has held up over the years,” Roberts told InStyle. “We all can use a bit of hair health and support, and this is it for me. I feel like my hair has had a holiday [after] using these products.”

It all sounded alluring, but would it do anything for me, Ms. Wispy-Cotton-Candy-Toddler-Fine Hair? I had to find out, so for 90 days—the three-month period Highbrow Hippie recommends to see results—I committed to using both.