Dyōtics Brow Henna is made of the finest Indian henna. Some pigments have been added to give the henna powder its beautiful brown colours and to make the henna stain the skin for a longer time. One of the ingredients is p-phenylenediamine which can cause skin ailments even in very low quantities. That is the reason why you should always perform a patch test on customers who are having henna brows for the first time. Especially if you are going to use Ash Brown or Raven. For the test, you should always use one of these shades, even when you want to use a light colour for the treatment.