The oldest belief is that the only function of hair in the human body is preventing heat loss. However, especially thanks to the improvements in molecular biology procedures, the knowledge we today have on human body demonstrates that hair follicles have significant roles in a great deal of dermal mechanisms. Hair follicles act as an important source of stem cells which enable wound healing in addition to the growing of hair.
The hair follicles are under the control of androgenic hormones, thyroid gland and your nutritional status. Any disorder in these systems may show up as hair loss.
A physician has the training to maintain a holistic approach to growing and shedding of hair, and hair transplantation. Before a hair transplantation procedure, the physician takes a holistic approach towards their patient and finds out if the patient has an underlying health problem. The exact cause of hair loss must be uncovered before hair transplantation.