Fatty Liver Disease: Symptoms, Causes and Management in the UK

Non-alcoholic fatty liver disease (NAFLD) is an increasingly common condition in the UK, affecting approximately 1 in every 3 people to some degree. It refers to a range of conditions caused by a build-up of fat in the liver. While a healthy liver contains little or no fat, early-stage fatty liver involves small amounts of fat accumulating within the liver cells.

Unlike alcohol-related liver disease, NAFLD is not caused by drinking too much alcohol. Instead, it is closely linked to metabolic health, particularly obesity, type 2 diabetes, and high cholesterol. In the UK, the National Institute for Health and Care Excellence (NICE) provides clear guidelines on identifying those at risk, as early intervention is critical to prevent the condition from progressing to more serious stages like non-alcoholic steatohepatitis (NASH) or cirrhosis.

One of the most challenging aspects of fatty liver disease is that it is often a 'silent' condition. In the early stages, most British patients report no symptoms at all. The condition is frequently discovered during routine blood tests for other health concerns.

However, as the liver becomes more inflamed or enlarged, some patients may experience:

• Dull or aching pain in the top right of the abdomen (over the lower right side of the ribs).
• Extreme tiredness or unexplained fatigue.
• Unexplained weight loss and general weakness.
• Oedema, which is swelling in the legs, ankles, or feet.

If you are experiencing persistent discomfort in the abdominal area, it is important to consult a healthcare professional. While these symptoms can be vague, they often signal that the liver is struggling to process fats effectively.

According to NHS guidance, you are at a higher risk of developing NAFLD if you have certain health markers. The liver acts as a filter for the body, and when the system is overloaded with excess energy or fats, the liver begins to store it locally.

Common Risk Factors include:

• Body Mass Index (BMI): Being overweight or obese, especially if you carry excess weight around your waist.
• Type 2 Diabetes: Insulin resistance makes it harder for the body to manage fats.
• High Blood Pressure: Hypertension is often part of the metabolic syndrome that drives liver fat.
• High Cholesterol: Elevated levels of triglycerides or LDL cholesterol in the blood.
• Age: It is most common in people over the age of 50, though it is rising among younger adults.

The diagnostic pathway usually begins with a Liver Function Test (LFT). This is a blood test that measures levels of specific enzymes and proteins, such as Alanine Aminotransferase (ALT) and Aspartate Aminotransferase (AST). Elevated levels of these enzymes can suggest liver inflammation.

If your LFTs are abnormal, a GP may refer you for an ultrasound scan of the abdomen. This allows clinicians to visualise the texture of the liver and see if it appears 'bright' or fatty. In some cases, a specialised scan called a FibroScan may be used to measure the stiffness of the liver, which indicates the level of scarring (fibrosis). NICE guidelines recommend using these non-invasive methods to assess liver health before considering more invasive procedures like biopsies.

The good news for British patients is that early-stage fatty liver is often reversible. There are currently no specific medications licensed in the UK to treat NAFLD directly; instead, the focus is entirely on lifestyle modification.

Lifestyle Steps:

• Weight Loss: Losing just 7% to 10% of your body weight can significantly reduce liver fat and inflammation.
• The Mediterranean Diet: Focusing on vegetables, fruits, legumes, and healthy fats (like olive oil) while reducing processed sugars and saturated fats.
• Exercise: Aim for at least 150 minutes of moderate-intensity activity per week, such as brisk walking or cycling.
• Alcohol Cessation: Even though NAFLD is not caused by alcohol, drinking can worsen the fat build-up and accelerate scarring.
• Managing Underlying Conditions: Ensuring your blood pressure and diabetes are well-controlled through medication and monitoring.

If you are worried about your liver health or have received blood test results that you don't fully understand, you can speak to a GP online for a calm, evidence-based discussion. An online doctor can review your symptoms, discuss your risk factors, and advise you on the next steps in the UK healthcare system.

Seeking a consultation early can help you implement a management plan before the liver undergoes permanent changes. A private GP consultation offers a convenient way to discuss sensitive lifestyle changes, diet plans, and how to monitor your liver enzymes over time. If necessary, they can provide a referral for further diagnostic imaging or blood work at a local clinic.