10/23/2026
Iron is best known for its role in blood, but that is only part of the story.
Your body uses iron to make hemoglobin, which helps red blood cells carry oxygen from your lungs to your tissues. Iron also supports muscle function, energy production, brain development, cellular function, and the activity of certain enzymes.
Your body cannot make iron from scratch. It must come from food or supplements, but your body also conserves and recycles much of the iron from aging red blood cells.
That is why understanding iron requires more than asking, “Am I eating enough?”
We also have to consider:
• Is iron being absorbed?
• Is iron being lost?
• Is inflammation affecting how it is stored or used?
• Which iron marker is actually low?
Next in Rooted in the Why, we’ll look at ferritin, hemoglobin, serum iron, TIBC, and iron saturation, because one result rarely tells the whole story.
Save this post if you have ever been told your iron was low but were not sure what that actually meant.
Educational information only. Iron supplements are not appropriate for everyone, and abnormal results should be interpreted alongside symptoms, medical history, medications, and other laboratory findings.