Since this thread is titled 'All About Fasting', I thought that perhaps sharing my experience could be useful too, although my protocol was rather unusual, so fwiw.
When I was a teenager (a schoolgirl), my parents sent me to a commercial clinic specialized in fasting where 99% of the patients were women who wanted to lose weight. I was a rare exception as my goal was not to slim down (I was thin), but to try this method and see if it helps to heal my ecsema/dysbiosis. Since none of the innumerous previous methods really worked for me, I agreed to this new experiment.
We were fasting for 10 full days, meaning that for 10 consequtive days we didn't eat anything at all, but we were drinking various drinks as prescribed by the doctors who were monitoring us all the way through. I must say that it wasn't too difficult in terms of hunger management: after a couple of days you get used to this fasting mode and you don't feel too hungry.
During that fasting period we also had a so-called 'liver cleansing' procedure. I don't remember all the details, but it included drinking olive oil, (some garlic?) and applying warmth to the liver area.
What surprised me in all that experience was that all participants still had quite regular and solid bowel movements even on day 10 without food. After 10 days we started eating small amounts of easily digestible food provided by the doctors (soups, etc.).
I lost about 10 kg in 10 days and weighted 32 kg (looked really skinny) when I left the clinic. As for my ecsema, unfortunately it didn't improve after the treatment, perhaps because my diet didn't change much afterwards (the doctor recommended me to add olive oil and ginger to my diet, which I did, but as I said that didn't heal my condition).
There were some other noticeable improvements though: better digestion (without constipation); more energy; better mood. Overall I do not regret this experience and find it interesting and useful. I would not want to repeat it though. As the doctors at the clinic admitted themselves, this method is designed for "lazy" people: those who eat whatever they want for the entire year and then arrive to the clinic to lose weight. The doctors actually recommended us to always follow a healthy diet instead of periodically applying their "shock therapy." Rare honesty for a commercial clinic.
So I guess that's all about my experience in a nutshell. Please don't try this method at home, as it is pretty intense and should be monitored and guided by professionals.