Indigo gives natural black colour to the hair and effectively covers gray hairs
Most hair dyes contain ammonia, ppd and other dangerous chemicals that can cause allergic reactions or can even cause cancer; indigo is natural having no side effects
Indigo also works as a nice hair conditioner; so, you need not use a separate conditioner after using natural hair dye
No ammonia formula for a pleasant smell
Formula blends away grey hair, and provides a luscious smell