All natural hair dyes..Unlike chemical dyes, henna coats the hair shaft with a protein called hennatannic acid. The result is subtle and semi-permanent color. Henna offers a natural, safe way to color hair and add body and shine to your hair without risking the adverse effects of harsh chemicals and petroleum or coal tar-based agents. To effect different shades, the henna is blended with small amounts of other botanicals like indigo, Centaurea, rhubarb, lic hen and litmus. (results vary)