I noticed how much caffeine was affecting me when I started getting way too sleepy at a certain new job after lunch. It was weird, because before I didn't reall

I noticed how much caffeine was affecting me when I started getting way too sleepy at a certain new job after lunch. It was weird, because before I didn't really feel tired after eating unless I stuffed myself, but now I was really tired and sleepy and could barely function. Turns out that this new job offered free coffee, so I was drinking one cup of coffee before commuting, another one when I arrived, and maybe one or two more later, but before lunch. The only reason I was sleepy was coffee: I was making my body dependent on caffeine to function normally in the morning, and I wasn't giving it coffee in the evening. Luckily I caught it early and could quit without problems, but it was interesting to see how quickly your body builds a tolerance and makes you dependent on a drug. I back up the advice of the OP and I'd suggest to everyone who drinks coffee regularly to check themselves, because they might be addicted even without having those noticeable symptoms the OP talked about.