Liver and kidney markers
Albumin Blood Test: What It Measures and What Low Albumin Means
Reviewed by a qualified clinician · analysed at UKAS-accredited UK labs (ISO 15189)
Last reviewed July 20266 min read
Every Helvy guide is written by our health editors, then checked by a qualified clinician before it goes live and re-checked as the science moves. We name clinical roles, not individuals, until each reviewer has agreed to be credited publicly. This is wellness guidance to help you understand your own data, not a diagnosis.
QUICK ANSWER
An albumin blood test measures the main protein your liver makes. A normal level is roughly 35 to 50 g/L, though labs vary. Low albumin can point to liver strain, kidney protein loss, inflammation or poor nutrition, but on its own it rarely means one thing. It is read alongside your other liver and kidney markers.
Find the test that checks your albumin →As of July 2026. Albumin turns up on almost every routine blood panel, so a lot of people meet the word for the first time on a results page. This guide sticks to what the NHS says albumin is, what a normal level looks like, and what a high or low result can point to.
You open your results and there it is: albumin, with a number next to it and no explanation. It is one of the most common markers on a UK blood test, and one of the least talked about. Here is what it actually tells you.
1. What is albumin?
Albumin is a protein made by your liver. It is the most common protein in your blood, and it does two big jobs. It holds fluid inside your blood vessels so it does not leak into your tissues, and it ferries things around your body, including calcium, hormones and many medicines.
Because the liver makes it, albumin is often used as a rough gauge of how well the liver is working over time. It is a slow marker, though. Albumin has a long half-life of about 20 days, so a single low reading reflects weeks, not a bad day.
You will usually see albumin grouped with a liver function test, and sometimes with total protein on a kidney panel too, because both organs affect it.
2. What is a normal albumin level?
Most UK labs put the normal adult range at about 35 to 50 g/L. Some report a slightly lower floor, nearer 30 g/L. The exact figures depend on the lab and its method, so always read your result against the range printed on your own report.
| Result | Typical range | What it suggests |
|---|---|---|
| Normal | 35–50 g/L | Liver making enough, kidneys holding on to it |
| Low | Below ~35 g/L | Read with your other markers, see below |
| High | Above ~50 g/L | Most often simple dehydration |
Ranges are a guide, not a diagnosis. For the wider picture, see our blood test reference ranges guide.
3. What does low albumin mean?
Low albumin, sometimes called hypoalbuminaemia, is far more common than high albumin. It is a signal, not a diagnosis. The usual causes fall into a few groups:
- Liver strain. A struggling liver makes less albumin. This shows up most clearly when other liver markers are off too.
- Kidney protein loss. Damaged kidneys can leak albumin into your urine, so blood levels fall.
- Inflammation or infection. Serious illness pulls albumin down quickly, which is why hospital patients often show low levels.
- Poor nutrition or malabsorption. If your body lacks protein, or cannot absorb it, albumin drops.
“A low albumin without alteration in other liver blood tests is unlikely to be of hepatic origin.”
— NHS Specialist Pharmacy Service
In plain terms: a low albumin on its own does not point at your liver. It only becomes a liver signal when the enzymes on your liver function test are off as well. This is exactly why one marker is never read alone.
4. What does high albumin mean?
High albumin is much less common, and it is usually simpler. The most frequent reason is dehydration. When you are low on fluid, there is less water in your blood, so the albumin in it looks more concentrated. Rehydrate, retest, and the number often settles.
A tight tourniquet or a clenched fist during the blood draw can nudge it up too. If a high result surprises you, a repeat test when properly hydrated is the sensible next step.
5. How to check your albumin
Albumin is almost never tested on its own, and it is not very useful in isolation. It earns its keep when it sits beside the markers it travels with: your liver enzymes, your kidney markers and total protein. Read together, they tell a story a single number cannot.
Helvy includes albumin in the General Energy & Wellness panel (£149), which also covers total protein, kidney markers and inflammation, and in the Thyroid & Vital Organs panel (£159), which reads it alongside a full liver and kidney profile. Both are home finger-prick tests, with results in about five working days from UKAS-accredited UK laboratories.
Not sure which markers you need? The build-my-test tool matches you to a panel from a few quick questions, and every marker comes explained. For the wider set of organ markers, our full blood count guide and metabolic health hub are good next reads.
READY TO TEST?
See albumin in the company it keeps
Helvy’s home blood tests read albumin next to the liver and kidney markers that give it meaning, with clear context on every number. So a result is something you can understand, not something you have to Google. Results in about 5 working days from UKAS-accredited UK laboratories.
Frequently asked questions
What is a normal albumin level?
Most UK labs use a range of about 35 to 50 g/L for adults, though some report a slightly lower floor. Ranges vary by lab and method, so read your result against the figures on your own report. This is general information, not medical advice.
Should I worry about low albumin?
Not on its own. Low albumin has many causes, from mild inflammation to poor nutrition, and it is only a liver signal when other liver markers are also abnormal. If your albumin is low, look at the full panel and speak to a qualified clinician about the pattern rather than the single number.
Does dehydration raise albumin?
Yes. Dehydration is the most common reason for a high albumin result. With less water in your blood, the albumin looks more concentrated. Rehydrating and retesting usually brings it back into range.
Can I test albumin at home?
Yes. Albumin sits in Helvy’s General Energy & Wellness and Thyroid & Vital Organs panels, both home finger-prick tests analysed by UKAS-accredited UK labs. It is read alongside your liver and kidney markers, which is the only way it means much.
Related guides
Test for this
Keep reading