Coloring hair for a new look or gray coverage is routine for many of us, but commercial dyes often contain chemical ingredients that are potentially harmful to both humans and the environment. P-Phenylenediamine (PPD), an active ingredient in most hair dyes, has been linked to skin irritation, as well as immune and nervous system problems. Ammonia, another common hair dye ingredient, can cause respiratory problems and throat irritation. Read more via EARTH911 |