The reason thinning hair is noticed in the first place is because the hair follicle is being restricted due to the abundance of DHT which chokes it to the point of becoming weak and brittle. The hair will eventually fall away. When the roots are nourished on a regular basis, the DHT is cleared away. Not just off the surface of the scalp, as in the cases of shampoos, but the oils penetrate deep into the roots, allowing the hair to grow. Once HAIRMETTO is no longer being used, its reasonable to assume that the DHT that initially caused the hair to thin would return. Over time, this could result in further hair loss. As long as the problem exists, thinning hair and hair loss will continue. Therefore, to ensure the scalp is halted from further hair loss, it is best to continue to supply the nourishment to the roots that HAIRMETTO provides. Once results have been achieved, many have found that they use it only once or twice per week as maintenance to ensure a healthy scalp.