16 Products That Work Wonders on Dry, Damaged Hair

The Rootist BioBrew Fermented Strengthening Serum ($48)

I love that this serum comes in spray form, and the small, one-ounce bottle makes it great for traveling. With just a few spritzes, the leave-in product controls frizz for up to 72 hours, adds shine, and detangles. You don't need to use it more than three times a week to see an improvement in the visible texture of your hair. I usually reserve this travel-size BioBrew for vacations and substitute with my larger It's a 10 Haircare Miracle Leave-In Plus Keratin ($30, originally $41) when I'm at home.