Is Spray Butter Really 0 Calories? The Truth About 'Zero-Calorie' Labels
                                
                                
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                                    4 min read                                
                            
                                According to the Food and Drug Administration (FDA) regulations in the United States, manufacturers can label products as having 'zero calories' if they contain fewer than five calories per serving. This legal loophole is the key to understanding whether spray butter is really 0 calories, as the labeled serving size is often unrealistically small.