I quit coffee for a while until I stopped smoking and whilst not having caffeine, I noticed an increase in energy, especially in the morning. I was watching Andrew Humberman or Joe Rogan and he was saying that a morning coffee caused you to crash after lunch time so I think I’ll quit again soon, probably when I go back to college. In terms of stuttering, I didn’t notice any difference on or off. The one negative effect I do notice is feeling anxious and clammy when driving right after a coffee