How is a "serving size" determined?
                                
                                
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                                    4 min read                                
                            
                                According to the U.S. Food and Drug Administration (FDA), serving sizes are not dietary recommendations but are based on Reference Amounts Customarily Consumed (RACCs), which are established from national food consumption surveys. This regulatory guideline dictates the standardized amount of food you see on a Nutrition Facts label.