Ferritin
What It Is
Ferritin is a protein that stores iron in the body. A ferritin test shows how much iron your body has in reserve.
Why It Matters
Low ferritin is the earliest indicator of iron depletion, whilst high levels can signal inflammation or iron overload.
If Levels Are High
Elevated ferritin may indicate iron overload (haemochromatosis), inflammation, liver disease, or infection.
If Levels Are Low
Low ferritin suggests depleted iron stores and is the most common cause of anaemia.
Preparation
No fasting typically required. Morning samples are preferred.
How Often to Test
Every 6–12 months, especially for those on plant-based diets or with a history of fatigue.
Panels Including This Marker
Acute Med 2
Next Day · 17 markers
Standard Screen
Next Day · 16 markers
Advanced GP 2
72 Hours · 28 markers
Advanced GP 3
72 Hours · 25 markers
Tired All The Time
48 Hours · 47 markers
Long Covid
72 Hours · 33 markers
+ 11 more panels
Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.