Revgrey Solution 30 ml contains 8 herbs and it gives more nourishment:An organically natural hair colour innovatively crafted with 8 essential haircare herbs supported by nourishing organic compoundsDermatologist recommended: A cruelty-free and vegan hair colour that’s recommended by dermatologists for colouring hair without any hair or scalp damages It will not increase your greys since it has no hydrogen peroxide (bleach), so it will not trigger greying of hair No harsh chemicals, so damage-free: Has no ammonia, no parabens and no resorcinols, so it will not turn hair dry, rough and brittle, will not trigger hair fall.Disclaimer:For more information contact your physician.