smoking can reduce the blood supply to the scalp skin and thereby destroy the follicle or stem cells of the follicles by reducing the blood and hormone reaching to these follicles. This may lead to more and early hair loss and graying as well. Smoking not only speeds up hair loss but can also makes hair loss prevention medications ineffective. More over in the early post operative period after Hair Transplant surgery healing and hair growth of the transplanted hairs can be affected and smoking should be avoided for 10 months. There are 4000 poisonous chemicals in cigarette e.g. tar, nicotine, carbon Monoxide. Carbon monoxide reduces the oxygen carrying capacity of blood and Nicotine reduces the blood supply to skin by constricting the blood vessels.
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