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Tetramethylbenzidine (TMB) Detection in Blood for Ferritin (Qualitative/Quantitative Screening)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of ferritin, a protein that stores iron in your body. Ferritin levels can help assess iron stores and identify conditions like anemia or iron overload.

Quick summary

["Ferritin helps detect iron-related health risks by checking your body’s iron storage capacity."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
107041-6
Short code
T-ALL MRD detection Bld FC
Synonyms
T-ALL MRD detection Bld FC
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test if you have symptoms like fatigue, weakness, or unexplained anemia. It can also be used to monitor iron levels in people with chronic diseases, blood disorders, or those at risk for hemochromatosis (iron overload).

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the blood draw if your lab uses a fasting protocol. Wear loose clothing and fasten your shirt collar for easy access.

What Happens During the Test?

A healthcare provider will insert a small needle into a vein in your arm. You may feel a brief pinch, but the procedure is quick. The blood sample is then sent to the lab for analysis.

What Are Possible Results?

Results may be reported as either qualitative (positive/negative) or quantitative (exact amount). Low ferritin suggests iron deficiency, while very high levels may indicate hemochromatosis or other conditions. Your doctor will interpret results in the context of your symptoms and medical history.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Ferritin Screening (Qualitative/Quantitative)

Frequently asked questions

What does a low ferritin level mean?
A low ferritin level may indicate iron deficiency, which can cause fatigue, weakness, or pale skin. Your doctor may recommend iron supplements or dietary adjustments to restore healthy stores.
Can diet affect ferritin test results?
Diet can influence iron absorption, but ferritin itself is stored in cells and reflects long-term iron status. Avoiding heavy iron supplements or certain foods (like excessive caffeine) before testing may help ensure accurate results, but follow your doctor’s instructions.
How often should ferritin levels be checked?
Your doctor will determine how often to check ferritin based on your symptoms, medical history, and treatment plan. Regular monitoring may be needed if you have chronic conditions like anemia or hemochromatosis.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy