In order to maintain the basic functions of the body, not only are a certain number of calories necessary, but also the intake of vitamins and minerals. Therefore we advise also against pure water fasting. With our programs such as some Buchinger fasting or juice regimens in professional fasting hotels you do not have to worry about the nutrients, because here you are well cared for. If you should want to fast on your own and this over a longer period of time, you should make sure to take sufficient vitamins and minerals. Of course, it is also important here to consider your personal needs. The best thing to do is to talk to your family doctor.