It's really hard to get your mind into a state where it can affect your reality so positively & dramatically though. They're commonly known as permission slips because they give your mind the ability to believe in something that is otherwise 'unbelievable'. I would use this knowledge to emphasize the effects rather than diminish them. Imagine those stem cells progressively being created & flooding your blood as you fast. From about day 2-3 imagine them filling your blood, working their magic in repairing damaged cells & regenerating tissues. It's not a huge leap of faith because we have so much supporting evidence in the effects of autophagy, cell regeneration, etc. The key is to use your mind to magnify these effects.