On average, a person loses between 50 and 100 hairs a day, which is a natural part of the bodys renewal cycle. Hair follicles go through a cycle that includes a growth stage and a rest stage before the hair falls out, and this cycle repeats itself for as long as the hair follicle remains active and continues to produce new hairs. Hair loss can be caused by a variety of factors, including genetics, hormonal changes, medical conditions, and nutrient deficiencies. Some chemical ingredients in shampoos can also be harmful and cause breakage or increased hair loss. If a person notices an increase in how much hair they wash out in the shower, they may wish to stop using the product and opt for a gentler formula. If the increase is sharp, it may be best to see a doctor or dermatologist.