Is bone marrow very fatty? A closer look at marrow composition
                                
                                
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                                    6 min read                                
                            
                                In adults, bone marrow fat can account for up to 70% of the bone marrow's volume, making it a significant portion of the body's total fat stores. This fact challenges the perception of marrow as solely a blood-producing factory and raises the question: is bone marrow universally and very fatty?