People love to debate the relative merits of different dietary philosophies (high carb, low carb, no carb, keto, carnivore, vegan, pescatarian, Mediterranean) and the health benefits of so-called “superfoods” (e.g., blueberries, chia seeds, kale, almonds, salmon), but suggesting that people should curb their caffeine intake might be the most contentious fight in all of food discourse—especially because it seems like every other week, a new study is published claiming that coffee is either the fountain of youth or certain to send you to an early grave.