Liver enzyme abnormalities: what do they mean and what to do?

Liver enzyme values on laboratory test results can be alarming for many people, especially if they are outside the normal range. However, it is important to understand that these abnormalities do not necessarily mean that you have a serious liver disease. In this article, we take a detailed look at what liver enzymes mean, the causes of elevated liver enzymes and how to check them. Our aim is to provide clear and reassuring information to help you better understand your body's signals and be prepared for your medical consultation.

The liver is one of the most important organs in the body, performing hundreds of vital functions, from detoxification to the processing of nutrients and the production of blood clotting factors. Enzymes found in liver cells, such as ALT (alanine aminotransferase) and AST (aspartate aminotransferase), are important indicators of liver health. When liver cells are damaged for whatever reason, these enzymes are released into the bloodstream and their levels rise.

This article is a guide for anyone who has experienced elevated liver enzymes and wants to understand the possible causes and what to do next. We describe the most common triggers, diagnostic procedures and treatment options, with a special focus on gastroenterological aspects.

Causes underlying liver enzyme abnormalities

Elevated liver enzyme levels can be caused by a wide range of conditions, from harmless, temporary problems to serious, chronic illnesses. A detailed examination is essential for an accurate diagnosis. Visit Endomedix Gastroenterology Centre professionals encounter such cases every day and have extensive experience in identifying the causes.

Common triggers

• Non-alcoholic fatty liver disease (NAFLD/NASH): Today, this is one of the most common causes of liver enzyme elevation. Fat build-up in the liver can cause inflammation, which damages liver cells. Obesity, type 2 diabetes, high blood fat levels and insulin resistance play a role.
• Alcoholic liver damage: Excessive and regular alcohol consumption directly damages liver cells, leading to a characteristic increase in enzyme levels (typically an AST/ALT ratio greater than 2).
• Viral inflammation of the liver (hepatitis): The hepatitis A, B, C, D and E viruses can all cause acute or chronic inflammation of the liver, which can be associated with dramatic increases in transaminase levels. Chronic hepatitis B and C in particular can lead to long-term cirrhosis (liver cirrhosis) and liver cancer.
• Drug-induced liver injury (DILI): Many medicines, including over-the-counter painkillers (e.g. paracetamol), antibiotics, cholesterol-lowering drugs (statins) and even herbal products, can put a strain on the liver and cause enzyme levels to rise.
• Autoimmune liver diseases: Autoimmune hepatitis (AIH), primary biliary cholangitis (PBC) and primary sclerosing cholangitis (PSC) are conditions where the immune system mistakenly attacks the liver's own cells or bile ducts, causing chronic inflammation and damage.
• Inherited diseases: Wilson's disease (a copper metabolism disorder) or haemochromatosis (an iron metabolism disorder) can also lead to liver damage and enzyme elevation.
• Bile duct problems: Biliary stricture or narrowing or blockage of the bile ducts can cause biliary stricture (cholestasis), which is associated with elevated levels of another type of liver enzyme, alkaline phosphatase (ALP) and gamma-glutamyl transferase (GGT).

Less common but important reasons

• Coeliac disease (gluten sensitivity): Sometimes the only laboratory sign of celiac disease is a slight elevation of liver enzymes, which normalises with a gluten-free diet.
• Thyroid disorders: Both underactive and overactive thyroid glands can affect liver function.
• Muscle damage: Because AST is found not only in the liver but also in muscles, severe physical exertion or muscle injury can cause an increase in blood levels.

How the check-up works: what can you expect from the doctor?

When you consult a doctor with elevated liver enzyme levels, the aim of the specialist is to identify the cause of the abnormality step by step. The examination always begins with a thorough interview (anamnesis), during which the doctor will ask you about your lifestyle, medication habits, alcohol consumption, any travel you may have done and any family history of illness.

Laboratory tests

The first step is usually to repeat and extend the laboratory tests. In addition to the basic liver function panel (ALT, AST, ALP, GGT, bilirubin, albumin, INR), the doctor may request additional specific tests to rule out or confirm possible causes:

• Virus serology: To detect the presence of hepatitis B and C viruses.
• Autoimmune panel: Detection of autoantibodies indicative of autoimmune liver diseases (e.g. ANA, SMA, AMA).
• Analysis of iron and copper metabolism: For suspected haemochromatosis or Wilson's disease.
• Coeliac serology: To rule out gluten sensitivity.
• Tumour markers: In case of suspected cancer.

Imaging studies

Imaging is essential to assess the structure of the liver, the condition of the bile ducts and any abnormalities.

• Abdominal ultrasound: It is the primary, painless and widely available test that provides information about liver size, structure (e.g. signs of fatty liver), dilated bile ducts, gallstones and larger nodules.
• FibroScan (Transient elastography): A special ultrasound-based method to painlessly measure the hardness (degree of fibrosis) and fat content of the liver. This test helps to assess the stage of liver damage.
• CT and MRI/MRCP: They give a more detailed anatomical picture of the liver and bile ducts. MRCP (magnetic resonance cholangiopancreatography) is particularly suitable for non-invasive, non-contrast imaging of the bile ducts. They are usually performed when ultrasound does not give clear results or when a specific lesion is suspected.

Endoscopic procedures and liver biopsy

In some cases, more invasive tests may be needed.

• ERCP (Endoscopic Retrograde Cholangiopancreatography): This procedure is used when a blockage (e.g. stone, stricture, tumour) is suspected in the bile ducts. ERCP offers not only diagnostic but also therapeutic possibilities, for example to remove stones from the bile duct or to bridge a stenosis by implanting a stent.
• Liver biopsy: Although it is less necessary nowadays thanks to the development of non-invasive methods, liver biopsy (histological sampling of the liver) remains the „gold standard” for making certain diagnoses (e.g. autoimmune hepatitis, drug-induced liver damage) and for accurately determining the extent of damage.

From Endomedix Gastroenterology Centre has the most advanced diagnostic tools, including advanced imaging and endoscopic technologies, to provide patients with the most accurate diagnosis and the most effective treatment plan.

What does the future hold? Managing liver enzyme abnormalities in 2025

Gastroenterology and hepatology are constantly evolving. Although the „Liver Disease Patient Story 2025” is still a future vision, current research trends already outline the changes that are likely to occur in the near future.

• Personalised medicine: With the development of genetic and molecular diagnostics, it is becoming increasingly possible to personalise treatments. This will be particularly important for the prevention of drug-induced liver damage and targeted therapy for autoimmune diseases.
• Advanced non-invasive diagnostics: Imaging and blood biomarkers (e.g. fibrosis markers) are becoming more accurate, further reducing the need for liver biopsy.
• New therapeutic targets: Several clinical trials are currently underway to treat non-alcoholic fatty liver (NASH). It is expected that within a few years, effective targeted drugs will become available that will be able to stop or reverse liver scarring.
• Role of the microbiome: A growing body of research shows a strong link between gut flora (microbiome) and liver disease. In the future, microbiome-based therapies (e.g. targeted probiotics, stool transplantation) may offer a new option for the treatment of liver diseases.

What can you do for a healthy liver?

Although testing and specific treatment are medical tasks, you can do a lot to keep your liver healthy.

• A healthy weight: Normalising body weight is one of the most effective ways to prevent and treat fatty liver.
• A balanced diet: Eat plenty of vegetables, fruit, whole grains and lean protein. Avoid processed foods, sugary drinks and saturated fats.
• Regular exercise: At least 150 minutes of moderate-intensity exercise per week has been shown to improve liver health.
• Moderate alcohol consumption: If you drink alcohol, do so in moderation. For chronic liver disease, total abstinence is recommended.
• Cautious use of medicines: Use only the medicines and dosage recommended by your doctor. Tell your doctor about any medicines you take, including herbs and supplements.

When expert help is needed

Elevated liver enzyme levels are a serious indication that needs careful investigation. Do not try to self-diagnose the problem at home! It is up to a specialist gastroenterologist or hepatologist to identify the exact cause and choose the appropriate therapy.

From Endomedix Gastroenterology Centre team is committed to providing you with the highest level of professional care. With our state-of-the-art diagnostic background and experienced specialists, we will help you find the cause of any liver abnormalities and set up a personalised treatment plan to help you regain your health and peace of mind as soon as possible. Don't hesitate to make an appointment for a consultation and take the first step towards recovery!