The Nioxin Hair Regrowth Treatment contains Minoxidil, the only ingredient clinically proven to effectively help hair growth in men and women. A colorless liquid for use only on top of the scalp, to help regrow hair. The amount of hair regrowth is different for each person. Not everyone will respond to the NIOXIN Hair Regrowth Treatment, and the result cannot be predicted. Nobody will be able to grow back all their hair. When first beginning the Nioxin Hair Regrowth Treatment, hair loss may continue for up to two weeks. This hair loss is temporary. If it continues after two weeks, consult your doctor.