You're agreeing with the study. They say regular coffee users have become numbed to it, and now the only affect they get is that it quells their withdrawal symptoms that were induced overnight. Most notably, headaches.
I agree with the study. I never felt more energized by coffee, and since increasing caffeine intake I wake up everyday with a headache.
I drink 3 coffees a day, however I never get headaches (unless it's an extremely hot and humid day)...
It was terrible, just terrible. I had skipped lunch, drank HALF a mochaccino and I was out of it, for the rest of the day and night.
At first, I felt like the king of the world. Creative, sharp, fast, insanely happy and giddy and just, on top of everything!
I normally talk pretty much anyways, and am pretty loudly when I get excited. The coffee version of me, though, not pretty. Everything times 10 and I had very little control over it. Totally uninhibited.
Then came the crash. I lost complete connection to my physical being, I had no muscular control over my extremities. I felt like a floating head. Sweating, shaking, had the stare going, paranoid, heart palpation, nausea and eventually fainted when I tried to fight it and stand up.
Went to the ER, as I had no idea what was happening. Hehe, doctors were like, yeah... go home.
To this day, I'm wondering if the coffee guy put speed in my coffee...
In addition to the accompanying digestive intolerance, THIS is why I don't do coffee. I HATE THE HIGH (feels like an LSD trip of sorts). And DETEST the crash.