Understanding Your Limits: How Long Is Fasting Unhealthy?
                                
                                
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                                    4 min read                                
                            
                                In a medically supervised study, an 8-day water-only fast was deemed safe under strict observation, but researchers concluded it could have become dangerous if continued unsupervised. This highlights the vital importance of understanding **how long is fasting unhealthy?** before attempting any prolonged dietary restriction.