Regular use of fast infuses the hair with everything required to stimulate and maintain a hyperaccelerated rate of hair growth most people will notice quicker growth in 34 weeks fast is a shampoo and conditioner system that works in combination to accelerate your hair growth up to 99 faster please note this listing is for the fast shampoo only new sls amp paraben free version for best results you must use both the shampoo and conditioner as a set fast contains the optimum ingredients f