The color of your hair is largely determined by the genes that you inherited from your parents and their ancestors. There are a few exceptions, mostly associated with disease or congenital anomalies that induce change in hair color.
Hair loss due to normal anagen-catagen-telogen cycling activity is usually recognized as normal by the individual man or woman; it is the amount of lost hair he or she is accustomed to seeing. Substantially more than 100 hairs lost per day is unusual and may indicate an abnormal shift in cycling activity.
Physician hair restoration specialists understand that hair restoration must be as individualized to the patient on the basis of (1) cause, pattern, rapidity and extent of hair loss, and (2) the wishes of the patient regarding desired result, cost, investment of time, and potential complications and side effects.