Protect Your Liver After COVID: What Research Says

Table of Contents

Can Long COVID Affect Your Liver? The Quick Answer

Yes. COVID-19 can affect the liver, and some people continue to have raised liver enzymes, including ALT, AST and GGT, months after infection. However, most of the strongest follow-up evidence comes from people who were hospitalised with COVID-19, and an abnormal liver test does not necessarily mean permanent liver damage.

Your liver helps process medicines, regulate hormones, produce blood-clotting proteins, manage energy and digest fats. But mildly raised liver enzymes do not automatically explain Long COVID fatigue, brain fog or hormonal symptoms.

If your liver tests are abnormal, your GP should assess possible causes rather than assuming Long COVID is responsible. You do not need a liver detox or an exhausting exercise programme to protect your liver.

Long COVID and Liver Health: Key Facts

COVID-19 can affect liver blood tests. Raised ALT, AST and GGT have been reported during infection and sometimes months afterwards.
Abnormal enzymes don’t always mean permanent damage. Several follow-up studies found that liver test abnormalities became less common over time.
Your liver has many jobs. It processes medicines, metabolises hormones, produces clotting proteins, regulates nutrients and makes bile for digestion.
A high ALT or GGT isn’t proof of Long COVID-related liver damage. Fatty liver disease, medications, alcohol and other medical conditions may explain the result.
Fatigue doesn’t automatically mean liver disease. Long COVID fatigue can occur even when liver tests are normal.
Liver detox supplements are not proven Long COVID treatments. Milk thistle, NAC and detox products have not been shown to reverse Long COVID-related liver abnormalities.
Pacing matters. If you experience post-exertional malaise, don’t push through exercise to improve liver health.
Persistent or unexplained abnormal results need assessment. Your GP may recommend further blood tests, imaging or specialist review depending on the findings.

If you’re living with Long COVID, you may have wondered how to protect your liver, especially if a blood test has shown raised ALT, AST or GGT. COVID-19 can affect liver blood tests, but an abnormal result doesn’t automatically mean permanent damage. Here’s what the research tells us, why your liver matters for hormones, energy and blood clotting, and what you can realistically do when you’re already exhausted.

But perhaps you’ve opened your latest blood results and noticed something unexpected.

ALT: high.

GGT: slightly raised.

Or your GP has mentioned that your liver function tests aren’t quite normal and would like to repeat them.

And there it is. Another thing to worry about.

When you’re living with Long COVID, even a small abnormal result can feel enormous. You’ve already spent so much time trying to understand what’s happening inside your body. The last thing you need is another unexplained problem.

So, can COVID affect your liver? Could Long COVID be responsible for raised liver enzymes? And what does your liver actually do for you, beyond the vague idea that it “detoxifies” your body?

Let’s look at what the research tells us, what it doesn’t, and what you can reasonably do without turning liver health into another exhausting project.

Can Long COVID Affect Your Liver?

Yes. COVID-19 can affect liver blood tests, and some people continue to have abnormal results months after infection. However, much of the strongest evidence comes from people who were hospitalised with acute COVID-19, rather than people with Long COVID following a mild infection.

Researchers have documented raised liver enzymes, particularly ALT, AST and GGT, during and after COVID-19.

Possible explanations include inflammation during the infection, medication-related liver injury, changes in metabolism and previously unrecognised liver conditions.

The encouraging part? In several follow-up studies, liver blood tests improved over time.

But an abnormal result shouldn’t automatically be blamed on Long COVID. Fatty liver disease, alcohol, medication effects, viral hepatitis and other conditions can produce similar findings.

The important question isn’t simply whether COVID can affect the liver. It’s why your particular result is abnormal, and whether it needs further investigation.

Your Liver Does Much More Than Detoxify

We hear so much about liver detoxes that it’s easy to forget what the organ actually does.

Your liver sits beneath your ribs on the right side of your abdomen. You probably don’t give it much thought on an ordinary day.

Yet it’s involved in hundreds of essential processes.

Think of it as a processing centre, storage facility, chemical laboratory and recycling system working together.

And unlike a machine, it doesn’t switch off at night.

1. It helps manage your energy

After you eat, your liver helps process nutrients absorbed from the digestive system.

It stores some glucose as glycogen, which can be released when your body needs energy between meals.

It also helps produce glucose when necessary and participates in fat and protein metabolism.

This doesn’t mean that the overwhelming fatigue of Long COVID is caused by the liver running out of energy.

Long COVID fatigue is much more complex, with research exploring immune, neurological, autonomic and metabolic mechanisms.

But understanding the liver’s role helps explain why significant liver disease can affect the whole body rather than just digestion.

2. It processes medicines and other substances

Many medicines are broken down or chemically changed by enzymes in the liver.

The resulting substances can then be used, further processed or removed from the body.

Alcohol is also metabolised largely by the liver.

This is what people usually mean by detoxification.

But your liver is already doing this work continuously.

It doesn’t need a juice cleanse, herbal detox tea or expensive supplement to begin functioning.

And drinking more water than your body needs won’t make it process medicines or toxins faster.

3. It helps regulate hormones

This is a part of liver function that doesn’t receive much attention.

Your liver helps metabolise and clear several hormones, including steroid hormones such as oestrogens and cortisol.

It also produces proteins that transport hormones in the blood and contributes to the metabolism of thyroid hormones.

This doesn’t mean every hormonal symptom is a liver problem.

But in significant liver disease, hormone metabolism can become disturbed.

That is one reason advanced liver disease can sometimes affect menstrual patterns, sexual function and other hormone-related processes.

For someone with Long COVID experiencing changes in menstruation, temperature regulation or energy, it’s tempting to connect everything to the liver.

The reality is more complicated.

Hormones are regulated by interconnected systems involving the brain, endocrine glands and other organs. Liver disease is only one possible contributor.

4. It makes proteins involved in blood clotting

Your liver produces many of the proteins that help blood clot when you are injured.

It also makes proteins involved in regulating clot formation and breakdown.

This matters because clotting is a balance.

Too little clotting can lead to bleeding.

Too much can contribute to dangerous clots.

Severe liver disease can disrupt that balance in complex ways.

But here’s an important distinction for Long COVID.

Researchers have investigated abnormal coagulation, vascular dysfunction and possible microclot-related mechanisms in post-COVID illness.

That does not mean a mildly elevated ALT or GGT explains clotting abnormalities in Long COVID.

The liver’s role in clotting is established biology. The precise mechanisms of persistent symptoms in Long COVID are still being studied.

Those two facts shouldn’t be confused.

5. It makes bile to help digest fats

Your liver produces bile, which helps your intestines digest and absorb fats.

Bile also provides a route for eliminating certain waste products, including bilirubin.

If bile flow is impaired, people may develop itching, jaundice, dark urine or pale stools.

This is why doctors sometimes pay particular attention to ALP, GGT and bilirubin results.

6. It produces albumin

Albumin is a major protein in your blood.

It helps maintain fluid balance and transports various substances around the body.

Low albumin can occur in advanced liver disease, but it can also result from inflammation, kidney disease, poor nutrition and other causes.

It’s one more example of why blood results need interpretation rather than guesswork.

What Are Liver Enzymes, and Why Might Yours Be Raised?

Imagine receiving a message from your GP:

“Your liver enzymes are mildly elevated. We’d like to repeat your blood tests.”

It sounds worrying.

But a raised liver enzyme is not the same thing as liver failure.

In fact, many so-called liver function tests measure signs of possible liver-cell injury or bile-duct problems rather than how well the liver is performing its essential jobs.

Here are the main results you might see.

Blood test	What it can tell you
ALT	An enzyme found mainly in liver cells. Raised levels may suggest liver-cell irritation or injury.
AST	Found in the liver but also in muscles and other tissues. A raised result isn’t always caused by the liver.
ALP	May rise with bile-duct problems, but can also come from bone.
GGT	Helps interpret possible liver or bile-duct abnormalities. Can also be affected by alcohol, medicines and metabolic factors.
Bilirubin	A substance processed by the liver and excreted in bile. High levels can have several causes, including harmless Gilbert’s syndrome.
Albumin	A protein made by the liver. Low levels can reflect several conditions, not just liver disease.

Doctors may also check clotting measurements such as INR when they need to assess the liver’s ability to make clotting proteins.

What does a slightly raised ALT mean?

It depends.

A mild increase can have many explanations, including metabolic dysfunction-associated steatotic liver disease (MASLD), medicines, alcohol, infection or temporary illness.

A single result doesn’t tell the whole story.

Your GP may want to know whether the result was previously normal, whether other markers are abnormal and whether you have relevant symptoms or risk factors.

Can AST be raised because of muscle problems?

Yes.

This is particularly interesting in the context of Long COVID, where muscle symptoms can be prominent.

AST isn’t exclusive to the liver.

Muscle injury or significant muscle exertion can raise AST, sometimes alongside ALT.

If the clinical picture suggests a muscle source, a doctor may consider a creatine kinase (CK) blood test.

So a raised AST doesn’t automatically mean your liver has been damaged.

What Does the Research Say About COVID-19 and Liver Damage?

This is where it’s important to separate three different situations:

Liver abnormalities during acute COVID-19.
Liver abnormalities that continue after the acute infection.
Liver problems specifically associated with the clinical syndrome of Long COVID.

The evidence is not equally strong for all three.

During acute COVID-19

Abnormal liver blood tests were frequently reported in hospitalised COVID-19 patients.

The American Association for the Study of Liver Diseases noted that raised aminotransferases were common during hospitalisation, usually mildly elevated and often occurring without jaundice.

Possible contributors included the inflammatory response, reduced oxygen delivery during severe illness, medication effects and other complications.

This doesn’t mean the virus directly damaged liver cells in every case.

After the infection: a 12-month follow-up study

A prospective study published in Frontiers in Cellular and Infection Microbiology in 2022 followed patients who had been hospitalised with COVID-19.

Among those tested at each follow-up point, the proportion with any abnormal liver blood test was:

25.1% at one month
13.2% at three months
16.7% at six months
13.2% at twelve months

Most abnormalities were mild, and liver tests generally improved over time.

The study also found that persistent abnormalities were more common in people with certain pre-existing conditions and metabolic risk factors.

That’s reassuring in one respect: an abnormal test after COVID doesn’t necessarily mean permanent liver damage.

But it also tells us something important about interpreting the evidence.

These were people recovering from hospitalised COVID-19. We cannot apply the percentages directly to everyone with Long COVID, particularly those who were never hospitalised.

A 2024 study looked at persistent liver abnormalities

A multicentre study published in JGH Open investigated adults who had been hospitalised with COVID-19 and abnormal liver biochemistry.

Among the selected participants assessed over six months, approximately 52% experienced normalisation of their liver tests.

Persistent abnormalities were associated with factors including higher BMI, metabolic-associated fatty liver disease and existing chronic liver disease.

This suggests that underlying metabolic and liver health may help explain why some people have ongoing abnormalities.

It does not establish that persistent SARS-CoV-2 infection is directly injuring the liver.

What about Long COVID itself?

A 2024 study published in Heliyon examined whether abnormal liver tests during acute COVID-19 were associated with later digestive symptoms.

The researchers found an association between liver abnormalities at admission and subsequent post-COVID digestive problems.

But association is not causation.

We still need better research following people with clearly defined Long COVID, including those whose initial infections were mild, to understand how often clinically important liver disease develops and why.

The evidence supports taking abnormal liver tests seriously. It does not support assuming that Long COVID inevitably causes progressive liver damage.

Why Might COVID-19 Affect the Liver?

There probably isn’t one explanation that fits everyone.

Inflammation during infection

COVID-19 can trigger a substantial immune response.

During severe illness, inflammatory signalling may contribute to changes in liver blood tests.

The liver is also involved in producing acute-phase proteins and responding to inflammation elsewhere in the body.

However, this doesn’t mean persistent inflammation is the cause of every abnormal liver test after COVID.

Reduced oxygen and circulation problems

In severe acute COVID-19, low oxygen levels, poor circulation or other complications can injure liver tissue.

This is particularly relevant to people who were critically ill.

It is less useful as an explanation for someone who had a mild infection at home and develops a slightly raised ALT a year later.

Medication-related liver injury

Some medicines used during acute illness can affect liver tests.

More broadly, certain prescription medicines, over-the-counter treatments and herbal products can occasionally cause liver injury.

The risk depends on the substance, dose, duration and individual susceptibility.

It’s not simply a question of how many tablets you take.

Metabolic health and fatty liver disease

This may be especially relevant for some people.

The condition previously called non-alcoholic fatty liver disease (NAFLD) is now commonly described as metabolic dysfunction-associated steatotic liver disease (MASLD).

It involves excess fat accumulating in the liver in association with metabolic risk factors.

MASLD is common, including in people who have never had COVID.

It may cause raised ALT or GGT, although liver enzymes can also be normal.

COVID-related illness, changes in activity, medication use and metabolic health may complicate the picture, but we shouldn’t assume COVID created the condition.

Could the virus persist in the liver?

Researchers have investigated SARS-CoV-2 material in tissues after infection and possible mechanisms of viral persistence.

This is an important area of Long COVID research.

However, finding viral material in a tissue does not automatically demonstrate ongoing infectious replication or prove that it is causing liver injury.

There is currently no established clinical test or treatment pathway for presumed persistent viral material in the liver as a cause of Long COVID symptoms.

Could Your Liver Be Causing Your Long COVID Fatigue?

It’s a reasonable question.

When you’re exhausted every day, you start wondering whether a hidden problem is contributing.

Significant liver disease can cause fatigue.

But fatigue is also extremely common in Long COVID, even when routine liver blood tests are normal.

There is no good evidence that mild liver enzyme elevations are the main explanation for Long COVID fatigue, post-exertional malaise or brain fog.

If your liver tests are abnormal, investigate them.

If they’re normal, that doesn’t invalidate your fatigue.

And if they are mildly raised, it doesn’t automatically explain all your symptoms.

One of the most frustrating things about Long COVID is that several processes may be happening at once.

A blood test can answer one question without answering all the others.

Can Long COVID Affect Liver Hormones or Blood Clotting?

Because the liver processes hormones and produces clotting proteins, it’s tempting to imagine that any liver disturbance could cause hormonal changes or blood-clotting problems.

In advanced liver disease, both can happen.

But a mild rise in ALT, AST or GGT is not evidence that your liver is failing to regulate hormones or clotting.

For example, changes in menstrual cycles following COVID-19 may involve several possible mechanisms. They cannot be attributed to liver dysfunction without supporting evidence.

Similarly, research into clotting abnormalities in Long COVID should not be confused with the coagulation problems seen in advanced liver disease.

If you have unexplained bruising, unusual bleeding or symptoms suggesting a blood clot, those deserve medical assessment in their own right.

They shouldn’t simply be labelled part of Long COVID.

Can Medicines and Supplements Affect Your Liver?

When you’re managing Long COVID, the number of treatments can gradually grow.

Perhaps you take an antihistamine.

Something for sleep.

Occasional pain relief.

A medication for POTS.

Then there’s vitamin D, magnesium, a supplement someone recommended online and another product you’ve been considering.

It’s understandable. When symptoms are relentless, you want to find something that helps.

But not every supplement is harmless simply because it’s described as natural.

Certain herbal and dietary supplements can cause liver injury, sometimes unpredictably.

Some medicines also require dose adjustments or monitoring in people with liver disease.

That doesn’t mean ordinary doses of all these products are damaging your liver.

Nor does it mean you should suddenly stop prescribed medication.

A better approach is to keep an up-to-date list of everything you take, including the dose and frequency, and review it with your GP or pharmacist.

If your liver blood tests become abnormal after starting a new product, mention the timing.

And be particularly cautious with products sold as “liver detox”, “immune reset” or “post-viral cleansing”.

Those claims often go well beyond the evidence.

What About Milk Thistle and NAC?

You may have seen milk thistle and N-acetylcysteine (NAC) recommended for liver protection.

NAC is an established medical treatment for paracetamol overdose, where it is used under clinical supervision.

That does not mean taking NAC routinely will prevent or reverse liver abnormalities associated with Long COVID.

Milk thistle has been studied in various liver conditions, but evidence of meaningful clinical benefit remains uncertain.

Neither is an established treatment for Long COVID-related liver abnormalities.

If you’re already taking supplements, a pharmacist or clinician can help you assess possible interactions and whether there is a reason to continue them.

The goal isn’t to discourage every supplement.

It’s to avoid adding expense, side effects and uncertainty to an illness that is already complicated enough.

What Symptoms Might Suggest a Liver Problem?

One difficulty with liver disease is that it can develop without obvious symptoms.

You can have abnormal liver tests and feel no different.

You can also have significant liver disease with relatively unremarkable blood results.

Still, certain changes deserve attention.

Yellowing of the eyes or skin

This is called jaundice.

It can occur when bilirubin builds up in the body.

New jaundice needs urgent medical assessment.

Dark urine or pale stools

Very dark urine and unusually pale or clay-coloured stools can sometimes indicate problems with bilirubin processing or bile flow.

These symptoms are particularly concerning when accompanied by jaundice.

Persistent itching without a rash

Itching can have many causes, including dry skin, allergies and medications.

But it can also occur in conditions affecting bile flow.

Persistent unexplained itching is worth discussing with your GP.

Pain in the upper right abdomen

Liver and gallbladder problems can sometimes cause discomfort beneath the right ribs.

However, many other conditions can cause pain in this area.

Severe pain, especially with fever, vomiting or jaundice, requires urgent assessment.

Unexplained bruising or bleeding

Significant liver disease can affect clotting.

But bruising has many possible causes, including medicines and blood disorders.

Don’t assume it comes from your liver or Long COVID.

And a small red spot on your skin is not, by itself, evidence of liver damage. Spider angiomas can occur for reasons unrelated to serious liver disease.

What Should You Do If Your Liver Enzymes Are High After COVID?

First, try not to interpret a single result in isolation.

A mildly raised enzyme and a very high enzyme are different clinical situations.

Your GP may consider the degree of elevation, the pattern of abnormalities, previous results, symptoms, medicines, alcohol intake and metabolic risk factors.

Depending on the findings, further investigations might include repeat blood tests, hepatitis screening, iron studies, an ultrasound or assessment for liver fibrosis.

Sometimes a raised result is temporary.

Sometimes it reveals a previously unrecognised condition.

The important thing is not to assume either that it’s harmless or that it must be caused by COVID.

Questions worth asking your GP

Which result is abnormal, and how far outside the reference range is it?
Are there any abnormalities in bilirubin, albumin or other markers?
Could medicines, supplements, metabolic health or another condition explain it?
Do I need further tests, imaging or a specialist referral?
When should the results be reviewed again?

You don’t need to understand every biochemical pathway.

You need to know what the result means for you and what happens next.

How to Support Your Liver Health When You Have Long COVID

This is where advice often becomes unrealistic.

Eat perfectly.

Exercise every day.

Cook everything from scratch.

Avoid every processed food.

Drink litres of water.

Take six supplements.

And somehow do all of that while you’re struggling to shower, prepare a meal or get through a conversation.

That’s not helpful.

Liver health advice has to work within the reality of chronic illness.

1. Eat what you can manage, aiming for balance

A varied diet with vegetables, fruit, wholegrains, protein and unsaturated fats can support general metabolic health.

For people with MASLD, dietary changes may form part of treatment.

But you don’t need a special detox diet.

And if you have nausea, food intolerances, poor appetite or severe fatigue, maintaining adequate nutrition may be more important than trying to follow an idealised meal plan.

Frozen vegetables count.

Tinned beans count.

A simple sandwich counts.

If you’re losing weight unintentionally or struggling to eat, ask for dietetic support rather than restricting more foods.

2. Be cautious with alcohol

Alcohol can contribute to liver injury and may worsen certain liver conditions.

If your liver tests are abnormal, discuss alcohol intake with your clinician.

Avoiding alcohol may be sensible while the cause is being investigated.

If you drink heavily or may be alcohol-dependent, seek medical advice before stopping suddenly, because withdrawal can be dangerous.

3. Review medicines and supplements

Don’t stop prescribed treatments without medical advice.

Instead, ask for a medication review, particularly if you’ve added several products over time.

Make sure your healthcare team knows about herbal supplements and over-the-counter painkillers.

4. Hydrate according to your needs

Adequate hydration supports general health.

But drinking excessive water does not cleanse the liver.

If you have POTS or another condition affecting fluid and salt requirements, follow the plan recommended by your clinician.

If you have advanced liver disease or a condition requiring fluid restriction, generic advice to drink more may be inappropriate.

5. Don’t push through post-exertional malaise

For people with metabolic fatty liver disease, physical activity can be beneficial when it is medically appropriate and tolerated.

But Long COVID changes the calculation.

If you experience post-exertional malaise (PEM), pushing through exercise can worsen symptoms and trigger a prolonged crash.

You should not be told to ignore PEM in the name of liver health.

Pacing, energy conservation and an individualised approach matter more than meeting a generic exercise target.

6. Address underlying conditions

If you have diabetes, high cholesterol, high blood pressure or MASLD, managing these conditions may help reduce longer-term liver risk.

That may involve medication, nutrition support and monitoring rather than an intensive lifestyle overhaul.

And if your liver tests remain abnormal, make sure the cause is investigated.

The most useful intervention may be treating an identifiable condition—not buying a liver supplement.

Do You Need Regular Liver Blood Tests If You Have Long COVID?

Not everyone with Long COVID needs repeated liver testing indefinitely.

But liver blood tests may be appropriate if you have symptoms, previous abnormalities, relevant medical conditions or medicines requiring monitoring.

Your GP can decide what is reasonable based on your circumstances.

If a result is abnormal, the next step should be a plan for assessment and follow-up rather than automatically repeating the same test without considering its cause.

And if your liver results are normal, you don’t need to assume that hidden liver damage is responsible for every unexplained Long COVID symptom.

Frequently Asked Questions About Long COVID and Liver Health

Can Long COVID cause high ALT levels?

Raised ALT has been reported after COVID-19, particularly in people who were hospitalised during the acute infection. However, a high ALT can have many causes, including MASLD, medication effects, alcohol and viral hepatitis. Long COVID should not be assumed to be the explanation without appropriate assessment.

Can COVID-19 cause liver damage months later?

Some follow-up studies have found persistent liver blood-test abnormalities months after COVID-19. Many abnormalities improve over time, and underlying metabolic or liver conditions may contribute. The long-term risk following mild infections and in people with clearly defined Long COVID remains less certain.

Is a slightly raised GGT dangerous?

Not necessarily. GGT is sensitive but not specific to one disease. It can be affected by alcohol, medications, metabolic conditions and bile-duct problems. Its significance depends on the degree of elevation, other test results and your medical history.

Can your liver cause fatigue and brain fog?

Significant liver disease can cause fatigue and, in advanced cases, cognitive symptoms. But mild liver enzyme elevations do not usually explain the full range of Long COVID symptoms. Brain fog and fatigue have many possible contributors.

Can COVID cause fatty liver disease?

Research has explored links between COVID-19 and metabolic or liver abnormalities, but MASLD is common independently of COVID. Having fatty liver after an infection does not prove that the infection caused it. A clinician should assess metabolic risk factors and other possible causes.

Can liver problems affect hormones?

Yes. The liver helps metabolise several hormones and produces proteins involved in hormone transport. Significant liver disease can disturb these processes. However, mild enzyme elevations are not evidence of clinically important hormone dysfunction.

Does the liver control blood clotting?

The liver makes many clotting and anticoagulant proteins. Severe liver disease can disturb the balance between bleeding and clotting. This is different from the clotting mechanisms being investigated in Long COVID.

Can antihistamines or painkillers affect the liver?

Some medicines can cause liver injury, although the risk varies considerably by drug and dose. Paracetamol overdose is a well-established cause of severe liver injury. Do not assume every medicine is harmful, but review your full medication list with a clinician if you have abnormal liver tests.

Is milk thistle good for liver recovery after COVID?

There is no convincing clinical evidence that milk thistle treats or prevents liver abnormalities specifically associated with Long COVID. Supplements may also interact with medicines or vary in quality.

Does drinking more water detox your liver?

No. The liver continuously processes substances through its normal metabolic pathways. Drinking enough fluid is important for general health, but excessive water intake does not speed up liver detoxification.

Should I exercise to improve liver health if I have Long COVID?

Not if doing so triggers post-exertional malaise. Physical activity can benefit metabolic health in people who tolerate it, but people with PEM need symptom-contingent pacing and should avoid pushing through crashes.

When should I worry about liver symptoms?

Seek prompt medical advice for new jaundice, dark urine with pale stools, persistent unexplained itching or worsening abdominal symptoms. Severe abdominal pain, confusion, vomiting blood or other signs of serious illness require urgent or emergency assessment.

Research and Trusted Sources

Liao et al. (2022) — 12-Month Post-Discharge Liver Function Test Abnormalities Among Patients With COVID-19.
A prospective cohort examining how liver blood-test abnormalities changed over twelve months after hospitalisation.

Rajaram et al. (2024) — Liver Dysfunction in Adults With COVID-19 Infection: A Longitudinal Study With Transient Elastography Evaluation.
A multicentre study investigating persistent abnormalities and the role of underlying metabolic and liver conditions.

2024 study in Heliyon — Liver Function Abnormality on Admission Predicts Long COVID Syndrome in the Digestive System.
An observational study examining the association between acute liver abnormalities and later digestive symptoms.

American Association for the Study of Liver Diseases — COVID-19 and the Liver.
Specialist resources on liver abnormalities during COVID-19 and clinical assessment.

American Association for the Study of Liver Diseases — Drug, Herbal and Dietary Supplement-Induced Liver Injury.
Clinical guidance on medicine- and supplement-related liver injury.

A Final Thought

Living with Long COVID can make you feel as though you’re constantly waiting for the next thing to go wrong.

A new symptom.

A strange blood result.

Another referral.

Another medical term you never expected to learn.

And sometimes the uncertainty is worse than the result itself.

But a raised liver enzyme isn’t a verdict on your future.

It’s information.

Something to interpret, investigate when necessary and follow up appropriately.

You don’t need to buy a detox kit or force yourself into an exercise programme your body can’t tolerate.

You don’t need to become your own liver specialist.

You need a clinician who looks at the result in context, considers other possible causes and explains what happens next.

Your liver is doing an extraordinary amount of work quietly, every day.

Looking after it doesn’t have to become another full-time job.

Medical disclaimer: This article is for general information and does not replace personalised medical advice. Liver blood-test abnormalities have many possible causes. Consult your GP or relevant specialist about symptoms, abnormal results, medication changes and supplements. Seek urgent assessment for jaundice or other concerning symptoms.

Lat Update October 2026