If we discount the obvious and clear effects on their cognitive functions, aka not eating makes you dumber (for a while). It also means you'll burn muscle mass and ever even nutrients from your brains to fuel your body. But habitual fasteners tend to loose the ability to think about long term consequences...



But don't trust me, any report on the biological effects of several day fasting will prove it. Chose any site/researcher you like, they all say the same.