This article originally appeared on InStyle.com.
What’s the next best thing to going through someone’s medicine cabinet—and having it be socially acceptable and not incredibly rude? Getting the scoop on the beauty products everyone was shopping for on Amazon in 2016. And that’s a very real opportunity because the retail giant has released a list of its most popular hair, skin, makeup, and wellness buys. From shampoo to oral care, see below for a few formulas shoppers are adding to their carts.