What is the mechanism by which fasting for 10 days helps "any sort of disease modern medicine is telling you is incurable" (as you say in another comment that i

What is the mechanism by which fasting for 10 days helps "any sort of disease modern medicine is telling you is incurable" (as you say in another comment that is no dead so I can't reply)? Are there any studies into the health benefits of not drinking water for 30 days?