Does Iron Carry Oxygen in the Bloodstream? The Role of Hemoglobin Explained
                                
                                
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                                    4 min read                                
                            
                                Approximately 98% of oxygen transported in the blood is bound to hemoglobin, a complex protein found within red blood cells. This protein, which contains iron, is central to answering the question: does iron carry oxygen in the bloodstream? The simple answer is that iron is a key component, but not the singular carrier.