after a few weeks you wont notice a difference. what you WILL miss though, is you can no longer push yourself when you need it by using caffeine as a crutch, a

after a few weeks you wont notice a difference. what you WILL miss though, is you can no longer push yourself when you need it by using caffeine as a crutch, and you will miss the "buzz" feeling. I go cold turkey on caffeine regularly for months at a time. then after my body has reset I slowly let it back in by drinking tea. (best time to quit is when you're sick with the flu or a cold, then you don't really notice that you're having withdrawal symptoms and its useful to tell yourself you feel shit because of the flu/cold..)