How to tell if your apple cider vinegar is bad
                                
                                
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                                    4 min read                                
                            
                                According to food safety experts, the high acidity of apple cider vinegar means it technically never expires. Knowing how to tell if your apple cider vinegar is bad, however, is less about safety and more about preserving its quality, flavor, and potency over time, especially for cooking and health purposes.