4. Being significantly overweight
Men who are obese (who have a body mass index of 30 or higher) are more likely than men who are a healthy weight to develop cancer, as are men who are overweight (have a body mass index that ranges between 25 and 30). While the exact reason why men who are obese or overweight have a higher risk of developing prostate cancer is unknown, it is believed that it has something to do with how their weight affects their hormones.
Most notably, testosterone, estrogen, insulin and insulin-like growth factor, as well as leptin, and all of these hormones have been linked to prostate cancer to some degree. Furthermore, men who are obese or overweight tend to eat diets that are high in trans fats, and it is believed that there may be some correlation with consuming foods that contain trans fats and prostate cancer.