wow, I didn't think I'd get any replies. It comes as a wonderful surprise. What sort of longterm fasting do you do? Maybe we can buddy up and message each other for support.
I made up the term entheo-fasting so you probably won't find it by looking it up on google just yet unless it already links to this page. I use the term entheogen loosely as anything that opens the doors of perception. Its' etymology signifies a substance that "induces God" and most people consider psychedelics like ayahuasca, psylocybin or LSD as having entheogenic properties. For me even green tea could have something close to it.
So I include any form of entheogen, green leaves and water in the entheo-fast just as long as it doesn't produce the sensation of taste as in spices, sweet fruit or oil, etc. Yesterday I just drank tea and water and chawed celery. This morning I chawed lemongrass and had guarana and water. So by most standards in a typical fast I think this wouldn't count. But I've felt some spiritual benefits that seem more powerful than if I added say an apple to it.