Although some fasting programs are advertised with “detoxification” claims, other fasting programs—including intermittent fasting and periodic fasting—are being researched for health promotion, disease prevention, improved aging, and in some cases weight loss: https://detox.cam/detoksikacija But there are no firm conclusions about their effects on human health. Also, fasting can cause headaches, fainting, weakness, and dehydration. There have been only a small number of studies on “detoxification” programs in people. There have been only a small number of studies on “detoxification” programs in people.