Shampoo – no matter how eucalyptus-y it might smell – can be one of the most toxic products on the drugstore shelf. Even the ones labeled “natural” were never required to be tested for safety and can contain endocrine-disruptors and carcinogens. So how do you tell the good from the bad? We’ve got you! Read on for our Guide to Natural Shampoo and 3 of our current favorites we think are worth checking out for yourself.