Check Your Ferritin
Understanding the Iron and Dopamine Connection
You go to the doctor because you are tired, anxious, or just feeling off. They run a blood test and tell you your iron is normal. But is it really?
After nearly four decades in functional medicine, I can tell you there is one marker that gets overlooked all the time. It is called ferritin. And it is often the key to your energy and mood.
Ferritin is your body’s storage tank for iron. Most people think iron is just about red blood cells and anemia. But iron plays a much bigger role than that. Your body needs iron to make dopamine. That is the brain chemical that gives you motivation and focus.
If your ferritin tank is running low, you cannot make enough dopamine. You end up feeling tired, unmotivated, and anxious. I call it a “dopamine deficiency.”
I have seen so many patients treated for depression when the real problem was simply low iron storage. Once we replaced the iron, the lights came back on.
Here is the tricky part. The “normal” range for ferritin on a lab report is huge. It usually runs from 15 to 150. But those ranges are based on population averages. They do not tell you what level makes you feel your best.
In my experience, most people feel better when their ferritin is closer to 100. If you are sitting at 20, you may technically be “normal,” but you probably do not feel great.
On the other hand, ferritin that is too high can also be a problem. It could point to a genetic condition called hemochromatosis, where you store too much iron. That can actually damage your organs.
Generally, I like to see ferritin in the 50 to 100 range.
I had a patient who was tired all the time. We could never get her ferritin level up, even with supplements. That is rare. But she found that eating red meat at least once a week finally kept her iron where it needed to be. Sometimes small changes make a big difference.
So if you are feeling tired, anxious, or unmotivated, do not just settle for a “normal iron” test. Ask your doctor to check your ferritin. It might be the missing piece of the puzzle.
Authored by Gerard Guillory, MD
Gerard Guillory, MD, is a board-certified internist who practiced for nearly four decades with a focus on functional, root-cause medicine. He is the author of three books on irritable bowel syndrome and the founder of It’s My Health, where he and his team put current health news in context and help members understand the underlying causes of chronic symptoms.
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