"anecdotally, I have noticed drinking a substantial amount of water does keep the lights on" I only drink water in the morning, 1/2 - 1 litre. This replaces th

"anecdotally, I have noticed drinking a substantial amount of water does keep the lights on" I only drink water in the morning, 1/2 - 1 litre. This replaces the loss during the night and I found out that I don't need any coffee after that any more (provided I got enough sleep). Similar things happen during the daytime: if I don't drink at work, I crawl home completely run down. With lots of water, I leave the office in good mood and after a few minutes, I am back to full capacity again. All this raised many doubts in the effects of caffeine in the morning. Overrated, I think. Its the liquid, not the coffee that does most of it (most, not all).