“Lack of nutrition for extended periods of time can result in mild symptoms such as fatigue, irritability, anxiety, drops in blood pressure, and even heart arrhythmias, confusion, seizures, or loss of consciousness.”
It is very important to always seek guidance beforehand, as Linsenmeyer added: “Very little high-quality research studies have been conducted on water fasting in humans.
“This is further complicated by the fact that there are no established parameters or guidelines around this type of fasting.
“There are plenty of anecdotes from individuals who have attempted water fasting in various ways, but these do not stand in the place of high-quality research studies.”
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source: express.co.uk