Many people in this thread are sharing that coffee/caffeine doesn't work for them, and then others are replying that it must not be true, there's scientific evidence!!11 Look, one scientific study doesn't mean it will work for everyone. It's very likely that there is plenty of counter evidence available, as with almost every study. We all live by our own personal guidance, and that's fine if it doesn't hurt anyone. Coffee or not, it's great what works for you. But those replying here saying that person's personal experience mist be wrong, are just rude and ignorant.