Water fasting, according to medical studies published on official medical websites:
– Short-term water fasting (24–72 hours)
Typically, a duration of 24–72 hours is considered a “relatively safe” period for water fasting, as the body enters ketosis during this time, which can activate the cellular cleansing process.
However, doctors warn that even such a period is better spent under the supervision of a medical specialist, especially if there are chronic diseases.
The risks of water fasting are the possibility of dehydration, hypotension, dizziness, headache, and loss of muscle mass
– Why dehydration during water fasting?
Because filling the body with water is not the same as hydration.
Hydration is not only water, but water plus electrolytes.
During water fasting, the body does not receive sodium, potassium, or magnesium, so the body cannot retain water in the cells, and water is quickly excreted. That is, it seems that enough water has been drunk, but the cells are not hydrated for a long time, because the channel of “metabolic water”, which enters the body with food, is blocked due to its absence during a water diet.
As a result, we can feel dry mouth, weakness, slight dizziness.
– During water fasting, the body enters ketosis: ketones are excreted through the kidneys, along with water and electrolytes.
This process is especially dangerous for diabetes and blood pressure problems, because:
dehydration increases the concentration of glucose in the blood, provokes pressure surges, the blood becomes thicker, which is a risk for the heart and blood vessels.
That is why doctors do not recommend water fasting for people with metabolic disorders.
– Medical warnings and recommendations in international medical practice
Water fasting should be performed under medical supervision, especially if it is planned for more than 24–72 hours.
Alternatives with more data on benefits:
Intermittent fasting (e.g. 16:8, 5:2) is an alternative and healthier way to lose weight. In this approach to eating habits, food is allowed during “eating windows” and other periods require calorie restriction.
A water diet without food is not the same as adequate hydration with a balanced diet that contains electrolytes and nutrients important for life.
This is part of a bigger system.
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