Ask Byrdie: Is Apple Cider Vinegar Safe for Coloured Hair?

We recently wrote about using apple cider vinegar as part of a regimen for training your hair less to be less greasy. One commenter, Erin Ross, had a very astute question: Is apple cider vinegar safe for colour-treated hair? We had our hunches, but we’re never ones to deliver advice based on mere supposition, so we turned to the experts.

Keep reading for all of the details on apple cider vinegar!