Henna

I've used Hennalucent in Sunset Glo for a protein treatment. I'm not sure the kind you will use but I liked the hint of color it gave my hair, it stays for a long time to. You will need a really good moisturizer, though.

A lot of women use henna on their hair out here. The only problem is that when you put it on, you can't use hair dye over it. You have to wait for it all to grow out first. I think that has something to do with the metalic salts in the henna.

Also, I don't know about using it for the hair but I'm assuming it would go on your scalp...The problem with using the black henna is that you don't know what kind of dyes they have used to make the henna black. Natural henna stains a reddy color. But you're using indigo so it could be OK.

I have also heard that repeated use of henna can actually dry the hair out, eventually making it like straw.

I used henna aaaaaaaages ago on my hair, but I can't really remember it very well hehe. Good luck with your decision!