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Hemoglobin is a protein, found in red blood cells, that carries oxygen from the lungs to tissues and organs. It plays a crucial role in our bodies, yet many people overlook its importance until health issues arise. Without enough hemoglobin, the body struggles to function properly, leading to fatigue, weakness, and other more serious conditions. What Hemoglobin Does in the Body Hemoglobin is a protein made up of four subunits, each containing an iron atom that binds oxygen. T