What is the weird substance in vinegar?
                                
                                
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                                    6 min read                                
                            
                                According to the Canadian Food Inspection Agency, the gelatinous disc or stringy blob found floating in a bottle of vinegar is a completely harmless substance known as "mother of vinegar". This naturally occurring biofilm is a normal byproduct of the fermentation process and can develop even in store-bought vinegar, particularly if it is unfiltered or unpasteurized.