Alcoholism can cause malnutrition, which I assume can't help hair growth. Nicotine causes vasoconstriction, which cant be good for hair. With these facts, I still won't stop drinking and smoking. I would rather be bald.
Preliminary findings from new studies of male and female identical twins suggest that a broad range of lifestyle factors, including stress, smoikng, heavy drinking, and sun exposure, may also foil the follicles.
In men, genes seemed to be the biggest predictor of balding, though smoikng, drinking, stress, and sun exposure also factored in. Although that may sound discouraging, experts say the research comes with a silver lining: Adopting healthier habits and controlling stress can sometimes help hair come back.