A Raised ALT with a Raised Ferritin
A raised ferritin is read as iron overload more often than any other result on a panel, and in this combination that reading is usually wrong. Ferritin is doing two unrelated jobs at once: holding the body's iron reserve, and rising in step with inflammation wherever it occurs. An inflamed liver lifts it without a gram of excess iron being present. Transferrin saturation is the number that tells the two apart, and it is frequently not requested.
The pattern on your report
- ALT High · mild Key
- Ferritin High · moderate Key
- Transferrin saturation Normal Key
- CRP Normal Key
Printed as: ALT in U/L— Upper limits differ between laboratories, and several now use lower sex-specific limits than the traditional ones.CRP in mg/Lor mg/dLFerritin in ug/Lor ng/mL— Identical in ug/L and ng/mL. It reports iron and inflammation at once, which is the difficulty here.Transferrin saturation in %— Reports only iron transport, so it disambiguates the ferritin. Judged on a fasting sample.
Why the numbers look like this
Ferritin is an acute phase protein. Any inflammatory process raises it, and a liver holding fat is inflamed by definition, so the two results rise together through a single mechanism that has nothing to do with iron stores.
Hereditary hemochromatosis produces the same pair by a genuinely different route. Faulty hepcidin signaling lets the gut absorb iron regardless of how much the body already holds, iron accumulates in the liver, and the damage raises the ALT. Here the ferritin really is reporting iron.
Transferrin saturation separates them because it reports only one thing: how loaded the transport protein is. Inflammation lowers it. Iron overload raises it. So the same ferritin with a low saturation means inflammation, and with a high saturation means iron.
Alcohol complicates this by doing both at once, raising ferritin through liver injury while also increasing iron absorption.
Not being flagged is not the same as normal
How high ferritin is allowed to go before it is flagged depends on your sex and on which laboratory ran it, and almost any acute illness pushes it up, so one raised value taken during or just after an infection carries very little weight. The number also scales with how much liver inflammation is present, which is why a markedly raised ferritin alongside a modestly raised ALT is a more interesting combination than either alone. Neither result is interpretable without knowing whether the person has been unwell recently.
What else on the report can hide this
Transferrin saturation, requested on the same sample, is the step that resolves this. Low or normal points at inflammation; clearly raised points at iron and makes HFE genotyping the next move.
CRP is worth adding, since it identifies inflammation from a source other than the liver and explains a ferritin that would otherwise be puzzling.
The metabolic panel then does most of the remaining work. Waist measurement, HbA1c, triglycerides and blood pressure describe the process that raises ALT and ferritin together in the large majority of people, and it is the process that responds to change.
A FIB-4 score needs no new blood, and it matters more than the enzyme level itself. Someone with a mildly raised ALT and a raised FIB-4 needs assessment; someone with a higher ALT and a low FIB-4 usually does not.
Alcohol has to be asked about directly, since it raises both numbers by two separate routes and changes what the iron results mean.
What usually causes it
Listed from most to least common — not from most to least serious.
- Very common
Metabolic liver disease
The dominant explanation. Fat in the liver inflames it, raising both numbers, with a normal or low transferrin saturation. The metabolic markers complete the picture.
- Very common
Alcohol
Raises ferritin through liver injury and also increases iron absorption, so it can produce this by two routes at once. A raised GGT or MCV supports it.
- Common
Inflammation from another source
Any recent infection or inflammatory condition raises ferritin. A raised CRP identifies it, and a repeat once well often resolves the picture.
- Common
Hereditary hemochromatosis
The explanation this pairing exists to catch. Transferrin saturation is clearly raised on a fasting sample, and HFE genotyping confirms it.
- Uncommon
Viral hepatitis
Damaged liver cells release stored ferritin. Serology identifies it, and treating hepatitis C is now straightforward and curative.
- Uncommon
Repeated transfusions — in people with thalassemia, sickle cell disease or marrow failure
From the history. Iron delivered directly, and chelation rather than venesection is the treatment.
- Uncommon
Autoimmune liver disease
Suspected when the metabolic explanation is absent. Autoantibodies and immunoglobulins identify it, and it responds to treatment.
- Rare
Adult-onset Still disease or macrophage activation
A very high ferritin with fever and a rash. This is an unwell person, not an incidental blood result.
What is usually checked next
- Transferrin saturation on a fasting sample The step that separates inflammation from iron, and the one most often missing from the request.
- CRP Identifies inflammation elsewhere, which explains a ferritin that would otherwise look alarming.
- HbA1c, triglycerides, waist measurement and blood pressure Describes the metabolic process that raises both numbers in most people, and the one that responds to change.
- A FIB-4 score Calculated from results already taken, and it predicts outcome better than the enzyme level does.
- HFE genotyping if saturation is genuinely raised Confirms hemochromatosis and opens family testing, which is where much of the benefit lies.
When to seek care sooner
- Emergency Confusion, drowsiness, or a swollen abdomen
- Emergency Vomiting blood, or black tarry stools
- Same day Yellowing of the eyes or skin
- Same day A very high ferritin with fever and a rash
- Soon Joint pain in the knuckles of the index and middle fingers
- Soon New diabetes, bronzed skin, or loss of libido
Questions worth bringing to your appointment
- Has my transferrin saturation been checked, not just the ferritin?
- Was I unwell around the time of this test?
- Could this be inflammation rather than too much iron?
- Has a FIB-4 score been calculated from my results?
- Do I need genetic testing for hemochromatosis?