Ferritin rarely gets ordered on a standard panel, and when it is, the reference range is wide enough to call most results normal. A woman can be tired, losing hair, cold most of the day, and foggy by afternoon, and still hear that her labs look fine, because everything that was actually run does look fine. The piece missing is usually ferritin itself, read against a range built to catch anemia, not to explain how a body feels day to day.
What ferritin actually measures
Ferritin is not the iron circulating in your blood. It is the iron your body keeps in reserve, the account it draws from when daily intake runs short. A standard lab typically reads anything above 10 ng/mL as within range, a bar low enough to catch outright anemia but not low enough to explain why you feel the way you do.
At Choosi, board-certified OB/GYN Dr. Tiffany Hall reads ferritin against an optimal band of 70 to 150 ng/mL, not the bottom of the standard range. A result in the 20s or 30s can clear a standard panel as normal while still sitting well below where most women stop feeling the symptoms it explains.
Why it gets missed so often
Most standard panels never run ferritin at all. A routine physical or an annual visit is more likely to order a complete blood count, which catches anemia, the late stage of the same underlying problem, without ever ordering the marker that would have caught it years earlier.
That order of operations matters. By the time a CBC flags anemia, the low-ferritin picture behind it has usually been building for a long time, and the fatigue, hair changes, and fog that came with it have often already been explained away as stress, aging, or a demanding season of life.
The symptoms low ferritin explains
When ferritin runs low, the same handful of symptoms tend to show up together, and each one is easy to attribute to almost anything else first.
- Fatigue that does not improve with sleep
- Hair shedding at the temples and crown
- Cold hands and feet, restless legs at night
- Brain fog and low motivation that feels like depression
None of these symptoms confirm low ferritin on their own. Together, without another clear explanation already on the table, they are exactly the pattern that sends us looking at iron storage first.
How we read and treat it at Choosi
Ferritin is one of the markers inside The Choosi Read, and when fatigue is the complaint that brought someone in, it is usually the first marker Dr. Hall looks at. It is also never read by itself. Serum iron, total iron binding capacity (TIBC), and transferrin saturation run alongside it, because ferritin alone can be pushed up by inflammation and needs the fuller iron picture to read accurately.
When ferritin comes back low, treatment usually starts the same visit, built to bring the number into the optimal band rather than just clear of the bottom of the standard range. A recheck at twelve weeks confirms the plan is working, and the plan gets adjusted from there.
“I read ferritin first. It is the single marker that explains the most symptoms in the women who walk in saying they were told their labs were normal.”
Dr. Tiffany Hall
If fatigue, hair shedding, or a fog that will not lift sound familiar, the next step is finding out what your own ferritin actually reads, not guessing from a symptom list.
Ferritin is one piece of a larger picture. See the full set of markers we check when fatigue is the complaint, or start further back and look at what The Choosi Read tests before any plan begins.