While there are plenty of products addressing each of those hair types and specific needs ... Which is where Function of Beauty comes in. Founded in 2016 by a trio of chemists and engineers ...

Prose sends you your haircare products in 10 to 15 days, while Function of Beauty takes seven to nine business days. Both services let you go back to your profile and readjust your hair quiz ...

Insider has tested Function of Beauty's personalized haircare ... After using both products, I did notice that my hair was a few shades brighter; not near the level that you get after a salon ...