Congratulations on your achievement. How was your 20-day-fast done? Drinking only water or eating intermittently?
You mentioned more cleanse style fast, however what your definition of cleanse style fast is not at all cleansing fast. It is called partial eating and that will damage you more than you can think of. Whereas fasting with just water will cleanse your body and mind. You will not damage your body this way, even if you did a long fast. Fasting can only hurt you when it is not done properly and when you do not brake your fast when true hunger returns.
If you are thinking of water only fast, please read this book.....