Will you lose muscle if you fast for 4 days?
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6 min read
Most people incorrectly assume that fasting for extended periods, such as a 4-day fast, will inevitably lead to significant muscle loss. However, the human body is remarkably adaptive, switching its energy source from glucose to fat to protect muscle protein during periods of food scarcity. This article explores the science behind what truly happens to your muscles during a 4-day fast and how to minimize any potential impact.