In a recent interview with W magazine, the model and actress didn't hesitate to name-drop her go-to: Kérastase's Resistance Bain Extentioniste Shampoo. "I used to be one of those 3-in-1 drugstore ...

VIDEO: 6 Beauty Products Under $12 You Should Buy from the Drugstore Courtesy Kerastase Bain Extentioniste Shampoo $33 Kerastase I'll be upfront about the downside: It's $33, which is very ...

shedding, and thus, thin hair—and instead ensuring denser, fuller, and longer strands. There are a total of four products: a serum, a treatment mousse, a conditioner, and a (the) shampoo.