But, what exactly is henna hair dye made of? According to Surya Brasil, co-founder Wanda Malhotra, henna is a plant (“lawsonia inermis”) that grows in hot, dry climates. The leaves are harvested, dried and ground into a fine powder that’s made into a paste and used to dye hair, skin and even fingernails. http://www.huffingtonpost.com/entry/henna-hair-dye_us_57339e19e4b060aa78194123
