Are Marrow Bones High in Calories? A Comprehensive Nutritional Guide
                                
                                
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                                    3 min read                                
                            
                                According to nutrition data, a 100-gram serving of raw caribou bone marrow contains a significant 785 calories, demonstrating its energy density. So, are marrow bones high in calories? The answer is a clear yes, primarily because bone marrow is predominantly composed of fat.