Like an underfed weightlifter, dry, damaged, and frizzy hair is in major need of a protein boost. Instead of relying on stopgap measures, Keratherapy products deliver the main ingredient your hair craves: keratin, the protein found naturally in strands. After years of working with high-end haircare brands, former salon consultant David Mulhollen envisioned a line that could address the spectrum of hair damage with this key hair-saver. And with that, Keratherapy took off--and our strands thank him for it.