What It Is: "This is being touted as a clarifying product to use on the hair," says McMichael. She says it's a gentle cleanser, but you miss out on the convenience aspect because you have to mix it with water before you apply it to your scalp.

Cons: "The biggest problem with 'no poo' [washing your hair without shampoo] is that many experience extremely oily and greasy looking strands in the beginning," Nussbaum says. That's because your scalp is still producing oil at the elevated rate it was when your hair was being stripped with your regular shampoo. "Baking soda doesn't strip your hair of the natural oils so there is a buildup of oils for a period of time till your scalp readjusts and stops pumping out extra oil," she explains.

Who It's (Not) Good for: McMichael doesn't recommend this treatment to those with hair that's damaged or very dry.

Tips & Tricks: Use one part baking soda to three parts water to get rid of silicones from your styling products. And concentrate the mixture on your scalp, where most of the buildup occurs, says Nussbaum. She adds you should always (always) follow up with an ACV rinse to restore the pH of your scalp.