Men who go bald before age 30 take a lot of ribbing from their friends. They may have the last laugh, according to a study from the University of Washington Medical School, because they have a lower risk of prostate cancer. Middle-aged men who developed bald spots before age 30 were 45 percent less likely to get prostate cancer. High levels of dihydrotestosterone in genetically-susceptible men is linked to baldness. Prostate cancer is typically treated with drugs that reduce testosterone.
We can infer from this study that high levels of testosterone might protect men from prostate cancer. We need more studies to confirm the link between baldness and prostate cancer.
Source: BBC News