There are many different causes of hair loss and they vary according to the type of hair loss.Hormonal and hereditary hair loss is the result of an inherent sensitivity of the hair roots to a certain form of the male sex hormone. Hair falls out but no new hair is being reproduced. Circular hair loss is caused by psychological strain and stress.The causes of diffuse hair loss are more diverse. Diffuse alopecia can be triggered by taking medication, infectious diseases or a thyroid dysfunction. However, very often pathological hair loss occurs due to long-term malnutrition, stress or hormonal changes, such as during pregnancy. Vivasan products promote hair growth.