Good luck with your fast, we'll support you through it here if you keep us updated. You don't need the supplements for nutrition as the body lives off it's stores comfortably while fasting. Also the body won't harm itself while fasting and will NOT produce kidney stones, this only happens when we feed it foods we shouldn't. On the contrary it will clean out any that are in the kidney or forming now. You shouldn't take anything orally, not even toothpaste which is absorbed and stimulates the taste buds- lessening the ability of the fast to cleanse and heal. Also medications can often have greater effect on a fasting body which absorbs everything better, this also means that side effects are increased and the drugs can potentially do more harm even than usual on our much cleaner system. It is best to stick to water only.