Henna is popular as an all-natural hair dye. It contains natural ingredients that provide long-lasting color to the hair. Henna is considered safe and a better alternative to other chemical dyes since it doesn't contain toxic or carcinogenic. The safety of henna is somewhat questionable, however, as some unscrupulous sellers add dangerous chemical materials. There are few simple tips on how to choose pure and natural henna powder for hair that will make the process much easier.