Living Proof got its start when stylists Mitch DeRosa and Ward Stegerhoek hooked up with MIT scientists to develop a moisture-controlling molecule. Their tech-forward approach to tresses hasn’t slowed down: Today, the Cambridge-based line boasts 33 products covering hair concerns from frizz control to curl enhancing, and you can test not-yet-launched ones at their recently opened Style Lab. Go ahead and earn your PhD—perfect hair day.