Comment by tombert

My goal wasn't to completely quit. The goal was to keep my caffeine intake less than or equal to 400mg (the FDA's recommended max) and to cut it off at 2pm. I didn't cold-turkey cut off caffeine.

I stopped getting acute headaches after about three days; other prolonged side effects are harder to quantify.

I should also clarify, it wasn't 800mg every day (which I realize I didn't make clear), it was just one thing where I saw that at least a few days of the last week I had consumed 800mg.