Here is article which confirms that henna is not safe as you think, please copy and paste link and read and tell me what u think!

Role of Oxidant Stress in Lawsone-Induced Hemolytic Anemia

Lawsone (2-hydroxy-1,4-naphthoquinone) is the active ingredient
of henna (Lawsonia alba), the crushed leaves of which are used as
a cosmetic dye. Application of henna can induce a severe hemolytic
anemia, and lawsone is thought to be the causative agent

http://toxsci.oxfordjournals.org/con...2/647.full.pdf.

Therefore if henna contains lawsone it is still not safe. !!!!

Any comments??