Exocrine Pancreatic Insufficiency (EPI): Symptoms, Causes and Treatment in the UK

Exocrine Pancreatic Insufficiency, commonly known as EPI, is a condition where the pancreas does not produce or release enough digestive enzymes to break down food. These enzymes—lipase, amylase, and protease—are essential for absorbing fats, carbohydrates, and proteins. Without them, the body cannot absorb vital nutrients, leading to malabsorption and malnutrition.

In the UK, EPI is often linked to underlying health conditions that damage the pancreas over time. While it can significantly impact quality of life, it is a manageable condition when diagnosed correctly and treated with evidence-based therapies as recommended by NICE (National Institute for Health and Care Excellence).

Symptoms of EPI can be subtle at first and are often mistaken for other digestive issues like IBS or coeliac disease. However, as the deficiency worsens, symptoms become more distinct:

• Steatorrhoea: The hallmark sign of EPI. These are stools that are pale, oily, particularly foul-smelling, and difficult to flush away due to high fat content.
• Unintentional Weight Loss: Even if you are eating normally, your body may not be absorbing the calories.
• Abdominal Pain: Often described as a cramping or gnawing sensation, frequently occurring after eating.
• Bloating and Flatulence: Excess gas produced by undigested food fermenting in the gut.
• Vitamin Deficiencies: Lack of fat-soluble vitamins (A, D, E, and K), which can lead to night blindness or weakened bones.

EPI is rarely a standalone condition; it is typically a complication of another issue affecting the pancreas. Key causes in the UK include:

Chronic Pancreatitis

Long-term inflammation of the pancreas, often due to long-term alcohol consumption or gallstones, is the most frequent cause of EPI in adults. Over time, the inflammation causes scarring (fibrosis), which destroys enzyme-producing cells.

Cystic Fibrosis

This genetic condition causes thick mucus to block the pancreatic ducts, preventing enzymes from reaching the small intestine. Most people with cystic fibrosis will require enzyme support from a young age.

Surgery

Operations on the stomach or pancreas (such as a Whipple procedure for cancer or weight-loss surgery) can alter the digestive anatomy, leading to a mismatch between when food enters the gut and when enzymes are released.

Diabetes

Both Type 1 and Type 2 diabetes can sometimes lead to a gradual reduction in pancreatic function, though this is less common than other causes.

If you suspect you have EPI, a GP will typically follow NHS diagnostic pathways. The most common initial test is the Faecal Elastase-1 test. This requires a small stool sample to measure the concentration of elastase, an enzyme that remains stable as it passes through the digestive tract. Low levels (typically below 200mcg/g) strongly indicate pancreatic insufficiency.

In some cases, further investigations such as a CT scan, MRI (MRCP), or endoscopic ultrasound may be required to look for structural changes in the pancreas, such as calcification or tumours.

The primary treatment for EPI is Pancreatic Enzyme Replacement Therapy (PERT). These are capsules containing pancreatin, a mixture of lipase, amylase, and protease derived from porcine sources. Notable brands in the UK include Creon, Nutrizym, and Pancrease HL.

How to take PERT

• Capsules must be taken with every meal and snack containing fat or protein.
• They should be swallowed with a cold drink; heat can deactivate the enzymes.
• The dosage is tailored to the individual and the fat content of the meal.

Dietary Advice

Unlike some digestive conditions, patients with EPI are generally advised not to follow a low-fat diet. Because fat is a vital energy source, the goal is to eat a balanced diet and simply increase the PERT dosage to match the fat intake. A referral to a specialist dietitian is often part of the NHS care plan.

Digestive concerns can be distressing and difficult to discuss in person. If you are experiencing persistent bloating, changes in your bowel habits, or unexplained weight loss, you can speak to a GP online to discuss your symptoms from the comfort of your home. An online GP can:

• Assess your symptoms and medical history.
• Advise on whether a faecal elastase test is necessary.
• Explain how to correctly use PERT if you have already been diagnosed.
• Provide referrals for further diagnostic imaging or specialist gastroenterology reviews if required.

Seeking early advice for digestive health concerns is crucial to prevent long-term complications like malnutrition or bone density loss.