Hi. Most brands use chemicals and PPD which may cause allergy. However, if u have had no reactions while using the same you may continue to do so. One brand called vegetal hair dye is safe and claimed to be of pure vegetable origin. You could try this. Hope this helps. Warm regards. Dr Govind S Mittal
Answered2016-02-25 04:34:23
Let others know if this answer was helpful