You can put henna in your hair, but just to let you know you can't dye (or at least not successfully) your hair after you've done a henna treatment. For example, I have greys in the front and I did a henna treatment twice this year and my hair turned red in those areas. It looked nice and I didn't mind. I then tried to dye my hair black, but any grey hair that turned red with the henna is STILL red. You couldn't sledge hammer that thing off LOL