Where is hemoglobin found?

Hemoglobin is a vital protein found inside red blood cells (RBCs). It gives blood its red color and performs the crucial function of transporting oxygen from the lungs to all tissues and organs of the body. It also helps carry carbon dioxide, a waste gas, back to the lungs for exhalation. Each hemoglobin molecule contains iron, which binds to oxygen molecules. Low hemoglobin levels can lead to anemia, causing fatigue and weakness. Normal levels are essential for maintaining healthy oxygen delivery, energy levels, and organ function. Doctors often measure hemoglobin levels in blood tests to assess overall health.