Review on ORGANIC INDIGO POWDER for Hair Dye/Color - The Henna Guys (200g) by Casey Stevens

This is the only brand of indigo I have tried that has worked for me. If you use it on hair, be sure to apply it after you've already done the henna coloring process, or mix it with henna that has already released the color. I did it both ways. Applied after the henna process, it gives a pitch black color. Mixed with henna gives a rich brown color. My natural color is dark brown with about 10% grey. I get great gray coverage with indigo and henna. My hair has gotten much healthier and longer since I stopped using chemical dyes to cover my gray hair.