fasting is purificatory practice if done properly, physical purification, and mental purification if connected with spirituality. You need to take water and/or juice or fruits during fasting to enable your body speed up the process of purification. If you will not take anything, it will increase acid level as well as impurities will not be drained out of the body and it may harm your body if your fasting becomes starvation. so, even discuss withyour doctor before starting the regimen of fasting. Connect this process with Spirituality or higher thoughts, it will give you cumulative effects physically as well as mental peace and strength.
All the best. God Bless You.
