I henna my hair and I usually put semi dead baking spices in the henna mixture. Or you can try using them to freshen old sneakers.

I have used spices to freshen things before, but I'm curious--how and why do you use them with henna? I am toying with trying henna--the medical treatment has started to effect the color of my hair, and I think harsh chemicals might be dangerous right now. I'm supposed to avoid alcohol and secondhand smoke, much less perm and color solutions...