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A Low Albumin with Normal Liver Enzymes

By the Prismo editorial team Medically reviewed by Dr. Ethan Mitchell Reviewed 22 August 2026 4 min read

Albumin gets described as a liver test, and that description sends people looking in the wrong place. The liver makes it, but it falls far more often because inflammation has switched production down, or because it is leaking out through the kidney or the gut. Normal liver enzymes beside it are the clue that the liver is not the problem here.

The pattern on your report

  • Albumin Low · mild Key
  • ALT Normal Key
  • Bilirubin Normal Key
  • Total protein Low-normal Supporting

Printed as: ALT in U/LAlbumin in g/Lor g/dL— A tenfold difference: 32 g/L is 3.2 g/dL.Bilirubin in umol/Lor mg/dLTotal protein in g/Lor g/dL

Why the numbers look like this

Albumin is made by the liver at a steady rate and lasts about three weeks in the circulation, which makes it slow to move and therefore a poor marker of anything sudden. Three things bring it down.

Inflammation is the commonest. During an inflammatory response the liver reprioritizes, making more CRP and other acute-phase proteins and less albumin. That is a redirection rather than a failure, and it reverses when the inflammation settles.

Loss is the second. Albumin is a mid-sized molecule that a healthy kidney keeps out of the urine, so finding it there means the filter is damaged. The gut can leak it too, though far less often.

Reduced production is the third and the least common in someone whose liver enzymes are normal, because synthesis holds up until liver disease is well advanced.

Not being flagged is not the same as normal

Most reports draw the lower line at 35 g/L, or 3.5 g/dL. Two things move albumin that have nothing to do with protein: lying down for half an hour lowers it by a few units through fluid shifts, and a drip running into the arm being sampled dilutes it outright. Those explain a fair number of mildly low results in hospital that mean nothing at all.

What else on the report can hide this

A urine albumin-to-creatinine ratio is the test that earns its place here. Kidney protein loss is the specific, findable, treatable cause, and it produces no symptoms until the losses are large enough to cause swelling. NICE treats a confirmed ACR of 3 mg/mmol or more as clinically important proteinuria, so this is not a subtle threshold to reach.

CRP alongside separates inflammation from loss without any further testing: a low albumin with a raised CRP in someone who has been unwell needs no investigation of its own. The globulin, which is total protein minus albumin, adds the other half of the picture. Both low points at loss or malnutrition; albumin low with globulin high points at chronic inflammation or a plasma cell disorder.

What usually causes it

Listed from most to least common — not from most to least serious.

  1. Very common

    Inflammation or recent illness

    Any infection, injury, surgery or flare, and the low-grade inflammation of an underlying cancer. CRP is raised, the albumin recovers over weeks once the cause has settled, and nothing else needs doing.

  2. Very common

    Protein loss through the kidney

    Detected by a urine ACR, which should be the first test ordered. Swelling of the ankles or around the eyes, or frothy urine, when losses are large.

  3. Common

    Poor intake or malabsorption

    Frailty, alcohol, celiac disease or inflammatory bowel disease. Often with a low ferritin, B12 or magnesium alongside.

  4. Common

    Fluid dilution and posture

    Intravenous fluids, heart failure, or simply having been lying down. A mild reduction with nothing else abnormal, and it is not a protein problem at all.

  5. Common

    Pregnancy

    Plasma volume expands faster than albumin production, so the concentration falls. Expected and needs no action.

  6. Uncommon

    Advanced liver disease

    Synthesis holds up until late, so with normal enzymes this is unlikely. Look for a raised INR, a low platelet count, or an enlarged spleen before concluding it.

  7. Rare

    Protein-losing enteropathy

    Albumin lost through the bowel with a normal urine protein. Considered when nothing else explains it, and confirmed by a stool test for alpha-1 antitrypsin.

What is usually checked next

  • Urine albumin-to-creatinine ratio Finds kidney protein loss, the cause that is both specific and treatable, and it needs one urine sample.
  • CRP A raised CRP explains a low albumin outright and stops the investigation there.
  • Total protein, with the globulin calculated from it Both low points at loss or intake; albumin low with globulin high points at chronic inflammation or a paraprotein.
  • Celiac serology with a total IgA Covers the commonest absorptive cause, and the total IgA is needed because IgA deficiency makes the celiac test read falsely negative.
  • INR, platelets and an ultrasound if the liver is still in question Tests liver synthesis properly, which the enzymes do not.

When to seek care sooner

  • Emergency Breathlessness at rest, or unable to lie flat
  • Soon Swelling of the legs, abdomen or around the eyes
  • Soon Frothy urine
  • Soon Unintentional weight loss, or bone pain
  • Soon A falling albumin with a rising INR or a falling platelet count
  • Soon Persistent diarrhea with weight loss

Questions worth bringing to your appointment

  1. Has my urine been tested for protein?
  2. Was a CRP done at the same time, and could recent illness explain this?
  3. What is my globulin, and what does the split suggest?
  4. Does my albumin need investigating at all, given my liver enzymes are normal?
  5. Was I lying down or on a drip when this was taken?

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