Henna is a great natural way to color your gray hair while making your strands stronger and shinier. Henna is a chemical-free treatment that's perfect for coloring natural hair and locs. Henna gives your hair a black/indigo, brown-reddish or ginger tint. It's plant-based properties have been knows to help treat inflammation on the scalp. It helps reduce frizz, conditions your hair and scalp while soothing itching and dandruff. A consultation is required to test if for allergies and to determine which shade of henna is right for you.