I have been looking for an alternative to henna that still isn't as nasty as chemicals. Just can't stand the red color with henna, even after adding indigo and amla. I thought I found one in Aubrey Organics but their product contained henna, although they never say it has henna in it on package, just the technical name for it. Result was purple hair.
If anyone has tried another product that can give you a natural brown color I would love to know.