We PROVE Ancient Sunrise® hair dyes to be 100% pure henna, indigo, and cassia, without contaminants, chemical dyes, and metallic salts. We send every batch to an independent laboratory to certify that there are no pesticides or adulterants. There are no hidden ingredients or herbs added to Ancient Sunrise® powders. Because these are 100% plant products, they cannot lift hair color. Each kit has been designed according to the art and science of henna to produce the best results. Ancient Sunrise® products are safe to use over chemically treated hair.