With proven ingredients like biotin, caffeine and niacinamide, this color-safe pair aims to promote stronger, thicker locks.

The best hair growth serums tend to include two ingredients, and it’s important to understand why doctors are prone to recommending both of them: finasteride and minoxidil. For minoxidil, it works to prolong the anagen phase of each individual hair follicle. This is the phase when hair follicles are actively producing new growth.

After all, you can’t help but notice it everywhere — so much that I find myself searching for new ways to prevent any more hair loss. That’s where $14 Kitsch Volumizing Rosemary and Biotin Shampoo Bar comes in.

Thousands of shoppers have reported significant improvement in hair fullness and length since incorporating the aptly named Thickening and Hair Loss Shampoo from salon brand Zenagen into their routines.