How Many Hours of Fasting Is Bad for Your Health?
                                
                                
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                                    3 min read                                
                            
                                According to a 2019 study, up to 72% of participants experienced side effects like fatigue and dizziness during prolonged fasts. The answer to "how many hours of fasting is bad?" depends heavily on the individual's health, preparation, and duration, but extended periods beyond 72 hours without medical supervision pose significant health risks.