Booster from Alter Ego is a color intensifier cream that, depending on the desired color effect, amplifies or balances reflections, thereby allowing colorists to obtain full, intense and vivid colors. A powerful ammonia-free formula with a special blend of fruit extracts, Booster can be used in combination with all Alter Ego Italy coloring, super-bleaching and toning creams, with and without ammonia, up to a maximum of 25% of the total amount of the color used.