You may not be aware of the Placebo Effect[1]. What you experienced was not real in the sense that anything changed but your belief you felt better.
While the placebo effect can be a powerful mental illusion, it will not prevent damage to your organs (or death) during this 10 day dry fast. Please don't ever do this.
Of course placebo is involved in everything, as you know, whether you are aware of it or not, but the results of fasting are well studied and only a web search away.
