>The headache of withdrawal is the indicator that it is a physical
>addiction. Also there could be other physical symptoms of withdrawal
>that are not noticeable, but it doesn't matter. Almost all addictions
>are both physical and psychological.

CAFFEINE BLUES goes into great detail about the physical and psychological
addiction of coffee and yes it is both and yes it affects all the organ
systems. A very worthwhile read and you will not crave coffee again after
you read it. Well, not as much anyway. I was able to quit after reading that
book........ it is scary what caffeine does to you and almost all the
studies are funded by the coffee growers and/or food industry so the
negative side effects are not mentioned nor researched. Kind of like the vax.