Hair experiences product build-up ( when a combination of material is left to build up on your scalp) it can embed into the scalp which forms a hard layer of plaque on the scalps top layer of dead skin ( the epidermis) it may clog the pores and hair is not free to grow. The hair fertilizer will not only condition your hair and strengthen your hair strands but will unclog closed pores which will result in you experiencing rapid hair growth.