Snippet from the article:
Heredity has been blamed as one of the main causes of hair loss but a recent study found that, for about half of those going bald, genes have nothing to do with it.
The Korean Hair Research Society traced the family records of 1,220 people suffering from hair loss and found that only 41.8 percent of their fathers had the same problem. About 47.1 percent seemed to have been affected by their father’s genes and about 10 percent are assumed to have been affected by both of their parents, but neither appeared relevant in 41.8 percent of cases. The team tracked the hair loss status of the subjects’ parents and grandparents.
Read the rest — Hair loss not as hereditary as believed
If the Korean Hair Research Society just looked at parents and grandparents, it might not tell the whole story since the genes for hair loss can skip generations. The article does go on to say that stress, extreme dieting, and some medications can cause hair loss… which I don’t think is a surprise to anyone that reads this site regularly.
Unfortunately, I don’t know that these percentages can be applied to a larger population, as I haven’t even seen the actual study. There’s no information on where or if this study was published, but even so, the numbers just don’t sound right to me. Though certainly there is a percentage of hair loss cases caused by factors other than genetics, I still believe the vast majority are cases originate from somewhere in the family tree.