Some chemotherapy drugs can damage your hair cells. Cooling of the scalp is a proven approach to reduce chemotherapy-induced hair loss that has been used successfully by thousands of patients worldwide. The reduced temperature results in a reduced blood flow to the scalp area so that less chemotherapy reaches the hair cells. Hair cells are therefore not exposed to the full dose of chemotherapy and may be able to survive the chemotherapy treatment. In addition, cellular metabolism within the hair cells is slowed down. As a result, hair is less likely to fall out.