I wouldn’t be surprised. I’m one of the few people who avoid / completely cut off caffeine (I have the gene for caffeine giving me anxiety - DNA test shown as much, cannot find info via a quick search to back up the DNA, but it’s what my health DNA test said and I’ve been experiencing extreme anxiety whenever consuming caffeine). I’m 25 and a few months ago I was asked to give my ID when buying an energy drink, because the store has a policy of needing to be at least 16 to purchase it.