100% Organic No Chemicals or Preservatives Added Rainbow Henna Coats each hair's shaft with color. Smooths and seals the hair's cuticle for greater shine. Texturizes hair and gives it body. Blends naturally. Fades gradually. Lasts 4-6 weeks. Henna is an alternative to chemical hair colorings that are controversial to health considerations. Henna comes from small shrubs, called Lawsonia, that are native to the Middle East, West Asia, and North Africa. The leaves are dried and then pulverized to a fine powder. Rainbow chooses only the finest grade Henna.