Water fasting is a period when a person eats no food and drinks only water fasting in this way may help with weight loss, but is it safe, and do the effects last long-term?. Weight loss while water fasting. Weight loss occurs most drastically in the early days of a fast (water weight being a big part of this), then declines as the fast progresses during a water fast, women generally lose about 14 ounces per day and men, on average, lose 17 1/2 ounces per day this is an average, some days you may lose nothing.
weight loss while water fasting
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