Clinician handoff
Anemia
Designed for a 60-second scan in primary care. Use this to explain why this theory fits, what would weaken it, and which tests are most worth discussing.
Why this still fits
I've been experiencing fatigue and brain fog, with shortness of breath when climbing stairs. I'd like to check for iron deficiency and anemia - including ferritin, not just hemoglobin.
What would weaken it
- -Normal CBC, ferritin, iron studies, B12, and folate without any depletion pattern.
- -No breathlessness, pallor, heavy periods, blood loss history, or exercise intolerance traveling with the fog.
- -The fog behaves more like meal-timing, positional, hormonal, or mood-linked dysfunction than constant low reserve.
Key points to communicate
- •I want a real anemia and depletion workup, not just one reassuring number.
- •Please tell me whether blood loss, iron deficiency, B12 deficiency, or chronic disease is the better explanation.
- •If B12 deficiency is confirmed and dietary causes are unlikely, should I be tested for intrinsic factor antibodies to rule out pernicious anemia?
- •If anemia isn't the answer, I want to know which nearby causes still deserve attention.
Bring this to the visit
- •Any prior CBC, ferritin, iron panel, B12, or folate results with dates.
- •A list of risk factors: heavy periods, pregnancy, vegetarian diet, chronic blood loss, GI conditions.
- •Medication list, especially acid blockers (PPIs, H2 blockers) and metformin.
- •A note of physical symptoms alongside fog: fatigue, pallor, brittle nails, hair loss, restless legs.
Useful screening structure
- -CBC with ferritin is the minimum panel - don't accept hemoglobin alone.
- -Iron panel (serum iron, TIBC, transferrin saturation) if ferritin is borderline.
- -Reticulocyte count if the anemia is unexpected or not responding to supplementation.
Tests and measurements to discuss
CBC (Complete Blood Count)
Ferritin
What this helps clarify: Iron storage marker that can affect energy, focus, and cognition.
Range context
40-100 ng/mL
How to use the result
Save the result with date and symptoms from the same week.
Vitamin B12
What this helps clarify: Patient-facing vitamin B12 explainer route, useful when a story or clinician uses plain language instead of the active-B12 variant.
Range context
Lab context
How to use the result
Save the result with date and symptoms from the same week.
Folate
What this helps clarify: Essential for methylation and neurotransmitter synthesis
Range context
>20 ng/mL
How to use the result
Save the result with date and symptoms from the same week.
Anemia Testing
Investigate Cause (if anemia confirmed)
Questions to ask directly
- •My ferritin is in the 'normal' range but low - could it still be causing symptoms?
- •Should we check for an underlying cause of iron loss rather than just supplementing?
- •What is the target ferritin for cognitive symptom resolution - is 50-70 a better target than 12?
- •Should I take iron every day or every other day, and does the form matter?
Functional impact snapshot
- -Rate mental energy, word-finding, and concentration before and after iron correction.
- -Track whether physical symptoms (fatigue, exercise intolerance, restless legs) improve alongside fog.
- -Note the timeline: most people need 4-12 weeks of repletion before cognitive improvement.
Escalate instead of self-managing if
- •Rapid-onset severe fatigue with pallor, tachycardia, or shortness of breath at rest.
- •Black or tarry stools, blood in stool, or heavy uncontrolled bleeding.
- •Progressive numbness, tingling, or gait changes suggesting B12 neuropathy.
Peer-reviewed references
- 1. Camaschella C. Iron-Deficiency Anemia. N Engl J Med. 2015;372:1832-1843 [DOI]
- 2. Lopez A et al. Iron deficiency anaemia. Lancet. 2016;387(10021):907-916 [DOI]
- 3. HTTPS://WWW.WHO.INT/PUBLICATIONS/I/ITEM/WHO-NMH-NHD-MNM-11.1 [DOI]
- 4. Soppi ET. Iron deficiency without anemia - a clinical challenge. Clin Case Rep. 2018;6(6):1082-1086 [DOI]
- 5. NICE CKS ANAEMIA; SOPPI, CLIN CASE REP, 2018 [DOI]