One downside, however, is they can be a bit drying due to their higher pH levels and higher concentrates. If you find shampoo bars dry out your hair after using, consider rotating between a ...

EcoRoots Moroccan Oil - Zero Waste Shampoo Bar ($13) Best for Dry and Frizzy Hair: Kitsch Castor Oil Shampoo Bar ($13, was $17) Best for Thin and Oily Hair: Ethique Volumizing Shampoo Bar ($16 ...