Why Does Natural Peanut Butter Have to Be Refrigerated? The Science of Spoilage
                                
                                
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                                    4 min read                                
                            
                                Unlike its conventional counterpart, which contains added hydrogenated oils to prevent separation, natural peanut butter is made with just peanuts and salt. This simple recipe is precisely why natural peanut butter has to be refrigerated after opening to preserve its fresh, nutty flavor and consistency.