Add Yahoo as a preferred source to see more of our stories on Google. Both Prose and Function of Beauty offer custom hair care regimens, which are formulated based on a questionnaire you fill out.

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Follow Lauren Edmonds Every time Lauren publishes a story, you’ll get an alert straight to your inbox!

PureWow editors select every item that appears on this page, and the company may earn compensation through affiliate links within the story. You can learn more about that process here. Yahoo Inc. may ...