Does Frozen Natto Have Live Cultures?
                                
                                
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                                    4 min read                                
                            
                                According to one manufacturer, the bacteria responsible for natto fermentation, *Bacillus subtilis var. natto*, are extremely resilient, capable of surviving temperatures far below freezing. So, does frozen natto have live cultures? The answer is yes, though with important nuances regarding the state and activity of the microorganisms.