Nothing changed for me but the caffeine. I did go through about a weeklong withdrawal where I could barely get out of my bed though.. it was tough I did feel I

Nothing changed for me but the caffeine. I did go through about a weeklong withdrawal where I could barely get out of my bed though.. it was tough I did feel I was half dead for a good week, but after that your body adjusts, and dare I say I'm more productive and focused now than when I was on caffeine.