What is Not a Lean Protein? Understanding Fatty Sources
                                
                                
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                                    3 min read                                
                            
                                According to the USDA, a lean protein source has less than 10 grams of total fat per 100-gram serving. Therefore, any protein source that exceeds this threshold or contains high levels of saturated fat is considered not a lean protein, impacting heart health and overall caloric intake.