The Color Booster will intensify the henna stain and will extend the longevity of henna, especially for people with oily skin. After extensive research, we found out that if you add Color Booster, which contains 2% Saline in the ingredient, to the henna mix, it will make sure the skin absorbs the henna pigment much better. A game-changer for Brow Artists that struggle with clients on which the henna don't stain as well as the expected result