Cigarette smoking could be partly to blame for hair loss in men, according to a new study.
While Alopecia, or hair loss, is largely a genetic condition, studies have shown environmental factors can contribute.
Researchers in Taiwan followed over 700 older men, looking at their hair loss, smoking habits as well as other risk factors. Men who smoked over 20 cigarettes a day had more hair loss than those who were not smokers.
Researchers say smoking may damage hormones that stimulate hair growth.
The survey included 740 Taiwanese men age 40 to 91 in 2005.