Tsubaki Abura Camellia Oil
"I have always loved this camellia oil ($20; tsubaki-abura.com
), and it's perfect for making hair extra shiny," says hairstylist Jenny Cho, who creates Jessica Chastain
's glossy strands with the product. "Even used alone, the oil works wonders, but sometimes I like to mix it with a leave-in conditioner for polished styles."