Apply the conditioner and work throughout the hair and into the roots allow the conditioner to remain on the hair for 1 minute rinse well if your hair requires more extensive conditioning leave on the hair 35 minutes then rinse well fast will work best if used once daily and it is recommended you use both the shampoo and conditioner to achieve maximum growth there is no need to use fast more than once a day fast works similar to a multivitamin in that the scalp and hair get an extra boost