smoking cigarettes cause hair loss doesn't just harm your lungs it can damage your too. Nicotine shrinks blood vessels, reducing oxygen and nutrients reaching the scalp. This weakens hair follicles, leading to excessive hair fall Can Smoking Cause Hair Loss:

There is a reason that every list of EDC essentials in print and on the web contains some lighter in the lineup

Still, even if nicotine causes a theoretical delay in recovery by allowing some hypertrophy of the mesolimbic system (including the VTA-nucleus accumbens pathway) to persist, it is still possible that the conventional wisdom is correctnamely, if smoking lessened the amount of stress that the addict or alcoholic felt while in recovery and this translated into fewer relapses

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They were also less likely to prescribe nicotine-replacement products to patients