Stress can affect your endocrine system in regards to increasing chances of dysfunction with abnormal hormone or insulin production. Hormones are the chemical controls of your body and due to the stresses the rates of hormones overall are changed. This can become chronic changes, that affect your body.
False, because then they have to experiment and see why it would be illegal. They would have to see if it harms health. If they discovered it today then, all the expirments and things we know already about alcohol and tobacco wouldn't exist. So they'd have to create that. So after a few years it would become illegal, but not at first. Your anwser is False.