I don't know if it actually helps, but for a while I was drinking so much coffee I gave myself ulcers.

I eventually got diagnosed ADHD in my 30s, and my doctor suggested that my coffee problem was a subconscious effort to self-medicate. I've been on stimulants for a few years and quit coffee easily (with some nasty headaches and such, but no real cravings)

I do still have coffee now and then, but only occasionally and only because I like the taste. I often stick to decaf when I do have it, too