The definitive roundup of the 100 greatest hair products as chosen by the people who know best – beauty industry insiders.

"When thinking about hair growth, you need to take a whole-body approach and address the root causes," says dermatologist Dr.

Considered the ultimate multitaskers, styling creams boast a plethora of benefits—hydrating hair follicles, holding styles, ...

Learn more about the reparative mask that earned a spot on our list of the Greatest Hair Products of All Time.

Celebrity hairstylist Jen Atkin, who counts Katy Perry and Jennifer Lopez as clients, created the heated round brush.