Natural shampoo bars don’t contain any form of SLS or surfactant. In fact, they’re a bit closer to a soap bar than they are a regular shampoo.
Some people prefer them for their hair type. However, they can be difficult to use and are most often unsuitable for use in a hard water areas.
Read our guide to using natural shampoo bars in hard water for more advice on how to get the best results for your hair.