Is Leftover Pizza Healthy? Answering the Age-Old Culinary Question
                                
                                
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                                    4 min read                                
                            
                                According to the USDA, perishable food left at room temperature for more than two hours enters the “danger zone” for bacteria growth. So, is leftover pizza healthy, or is that convenience risking foodborne illness? The answer is more complex than you might think and depends heavily on storage and original ingredients.