Henna boosts hair growth: The natural properties of henna help promote hair growth exponentially. The powder form of this ingredient can also be used to create an essential oil that nourishes and promotes hair growth.It can help reduce hair fall: Henna directly affects the scalp, assisting in improving follicle health. This helps curb hair fall, and also prevents and corrects hair thinning.It conditions your hair: When combined with hydrating ingredients such as eggs, henna makes a great conditioner. All you need to do is apply a henna hair pack on for a short period of time to ensure that your hair feels silky smooth for days on end.It can help prevent dandruff: Henna helps remove excess grease and dirt from your scalp, including dandruff. Using mehendi regularly on to your hair not only cures dandruff problems, it also prevents them from coming back.t’s a natural hair dye: One of its most obvious uses, henna makes a fabulous hair dye. Not only is it a great natural alternative to the otherwise chemical options available readily in the markets, it is also healthier for your hair, and cost-effective for your wallet.