How many calories are in a spleen? Understanding the nutritional profile
                                
                                
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                                    3 min read                                
                            
                                According to USDA data, a 100-gram serving of raw beef spleen contains approximately 105 calories, which is comparable to many lean muscle meats. This organ meat, often overlooked in modern diets, is an exceptionally nutrient-dense food prized for its rich and highly bioavailable heme iron, potent proteins, and essential vitamins, especially B12 and C.