Achylia is a condition where the stomach produces little or no digestive secretions. These secretions include stomach acid and enzymes that break down food. Without them, your digestive system cannot work properly. This article explains what achylia is, what causes it, how it is diagnosed, and what you can do about it.
What Is Achylia?
Achylia refers to the significant reduction — or complete absence — of digestive juices produced by the stomach. Normally, your stomach lining produces hydrochloric acid, pepsin, and other enzymes. These substances break down the food you eat so your body can absorb nutrients.
When achylia occurs, this process is disrupted. Food may not be properly digested, and your body may struggle to get the nutrients it needs. Over time, this can lead to a range of health problems, from mild discomfort to serious nutritional deficiencies.
There are two main types of achylia. The first is gastric achylia, which involves the absence of stomach acid and digestive enzymes from the stomach itself. The second is pancreatic achylia, which involves the absence of digestive enzymes from the pancreas. Both types affect how well your body digests food.
How Digestion Normally Works
To understand achylia, it helps to know how healthy digestion works. When you eat, your stomach lining releases acid and enzymes. These substances mix with food and begin breaking it down into smaller particles.
Stomach acid, also called hydrochloric acid, plays a key role. It helps digest proteins, kills harmful bacteria, and activates enzymes like pepsin. Without enough acid, digestion becomes slow and incomplete.
The pancreas also contributes important enzymes. These enzymes travel into the small intestine and continue breaking down fats, proteins, and carbohydrates. When either the stomach or the pancreas fails to produce enough secretions, achylia can develop. You can learn more about how the digestive system works at Healthline.
Common Causes of Achylia
Several conditions and factors can lead to achylia. Understanding the cause is important because treatment depends on what is driving the problem.
Autoimmune Conditions
In some people, the immune system mistakenly attacks the cells lining the stomach. This is called autoimmune gastritis. Over time, this damage reduces the stomach’s ability to produce acid and enzymes, leading to achylia.
Autoimmune gastritis is also linked to pernicious anaemia, a condition where the body cannot absorb vitamin B12. This is a serious nutritional concern that requires medical attention.
Chronic Gastritis and Infection
Long-term inflammation of the stomach lining, known as chronic gastritis, is another common cause. This inflammation can be triggered by a bacterial infection called Helicobacter pylori (H. pylori). H. pylori is one of the most common stomach infections in the world.
When H. pylori damages the stomach lining over many years, it can reduce the production of digestive secretions. Fortunately, H. pylori infection is treatable with antibiotics. Your family doctor can test for this infection with a simple breath test or blood test.
Pancreatic Disease
Conditions like chronic pancreatitis or pancreatic cancer can cause pancreatic achylia. In these cases, the pancreas loses its ability to produce digestive enzymes. As a result, fats and proteins are not properly broken down in the small intestine.
Chronic pancreatitis is often linked to heavy alcohol use or gallstones. However, it can also occur without a clear cause.
Ageing
As people get older, the stomach lining naturally becomes thinner. This can reduce the production of stomach acid and enzymes over time. Older adults are therefore more likely to experience some degree of achylia. This is why regular health check-ups become more important as you age, and your provincial health plan covers many of these visits.
Surgical Causes
Certain stomach surgeries, such as gastrectomy (removal of part or all of the stomach), can lead to achylia. When large portions of the stomach are removed, the remaining tissue may not produce enough digestive secretions.
Recognising the Symptoms of Achylia
Achylia does not always cause obvious symptoms right away. In many cases, the condition develops slowly over years. However, as digestive secretions decrease, certain signs begin to appear.
Digestive Symptoms
The most common symptoms relate to digestion. These include bloating, a feeling of fullness after eating small amounts, nausea, and discomfort in the upper abdomen. Some people notice that their stools change in colour or consistency, particularly if fats are not being properly absorbed.
In cases of pancreatic achylia, stools may become pale, greasy, and foul-smelling. This is called steatorrhoea, and it happens because undigested fat passes through the digestive tract. This symptom should be reported to a doctor promptly.
Nutritional Deficiencies
Because achylia impairs nutrient absorption, deficiencies are common. Iron deficiency anaemia is one of the most frequent complications. Without enough stomach acid, iron from food is poorly absorbed.
Vitamin B12 deficiency is also common, particularly in autoimmune-related achylia. This can cause fatigue, weakness, tingling in the hands and feet, and even cognitive changes. Furthermore, deficiencies in vitamins A, D, E, and K may develop if fat absorption is severely impaired.
Weight Loss
Unintentional weight loss can occur when the body fails to absorb enough calories and nutrients. This is more common in severe or long-standing cases of achylia. If you are losing weight without trying, this is an important warning sign to discuss with your family doctor.
How Is Achylia Diagnosed?
Diagnosing achylia involves a combination of tests. Your doctor will start with a detailed medical history and a physical examination. From there, they may order specific investigations.
Blood Tests
Blood tests can reveal nutritional deficiencies that suggest poor digestion. Low levels of vitamin B12, iron, or fat-soluble vitamins may point to achylia. Blood tests can also check for H. pylori antibodies and signs of autoimmune activity.
Gastric Analysis
In some cases, a gastric acid secretion test may be performed. This test measures how much acid your stomach produces in response to stimulation. It provides a direct measure of gastric secretion and can confirm the diagnosis of achylia.
Endoscopy
An upper endoscopy allows a doctor to look directly at the stomach lining. A thin, flexible tube with a camera is passed through the mouth and into the stomach. During this procedure, small tissue samples (biopsies) can be taken to check for inflammation, infection, or abnormal changes. Learn more about endoscopy at the Mayo Clinic.
Stool Tests
Stool tests can detect fat malabsorption, which is a sign of pancreatic achylia. They can also identify H. pylori bacteria. These tests are simple, non-invasive, and widely available through Canadian healthcare providers.
Treatment and Management of Achylia
Treatment for achylia depends on the underlying cause. There is no single cure, but many effective strategies can help manage symptoms and improve quality of life.
Treating the Underlying Cause
If H. pylori infection is responsible, a course of antibiotics combined with acid-suppressing medication can eliminate the bacteria. This is called triple therapy and is very effective when completed properly. Your family doctor can prescribe and monitor this treatment.
In autoimmune-related achylia, the focus shifts to managing nutritional deficiencies rather than reversing the damage. Vitamin B12 injections are commonly used when oral absorption is too poor to be effective.
Enzyme Replacement Therapy
For pancreatic achylia, enzyme replacement therapy is a key treatment. Patients take capsules containing pancreatic enzymes with every meal. These enzymes replace the ones the pancreas can no longer produce. As a result, digestion improves significantly and steatorrhoea is reduced.
Dietary Adjustments
Eating smaller, more frequent meals can ease the digestive burden. A diet rich in easily digestible foods, such as cooked vegetables, lean proteins, and low-fat options, is often recommended. High-fat and very spicy foods may worsen symptoms and are best avoided.
In addition, increasing dietary fibre gradually can support gut health. However, changes to your diet should be discussed with a registered dietitian or your doctor, especially if you have a complex medical history. Health Canada offers excellent guidance on healthy eating for Canadians.
Nutritional Supplementation
Supplementing key nutrients is often necessary. This may include iron supplements, B12 injections, and fat-soluble vitamins such as vitamins A, D, E, and K. Your doctor will monitor blood levels regularly to adjust supplementation as needed.
When to See a Doctor
You should speak to your family doctor if you notice persistent digestive symptoms such as bloating, unexplained weight loss, or changes in your stool. These symptoms do not always mean something serious, but they do deserve proper evaluation.
If you do not have a family doctor, a walk-in clinic is a good first step. Doctors at walk-in clinics can order initial blood tests and refer you to a specialist if needed. Most provincial health plans in Canada cover these visits at no direct cost to you.
Seek prompt medical attention if you experience significant unintentional weight loss, severe abdominal pain, or stools that are persistently pale and greasy. These can be signs of a more serious underlying condition that needs urgent assessment.
Always consult a qualified healthcare provider before making any changes to your diet, supplements, or treatment plan. This article is meant for general information only and does not replace professional medical advice.
Frequently Asked Questions About Achylia
What is achylia and how does it affect digestion?
Achylia is a condition where the stomach or pancreas produces little or no digestive secretions. Without these secretions, the body cannot properly break down food or absorb nutrients. As a result, achylia can lead to nutritional deficiencies, bloating, and digestive discomfort.
What causes achylia in adults?
Achylia can be caused by chronic gastritis, H. pylori infection, autoimmune conditions, pancreatic disease, or long-term ageing of the stomach lining. Certain stomach surgeries can also reduce digestive secretions and lead to achylia. Identifying the cause is essential for choosing the right treatment.
What are the most common symptoms of achylia?
Common symptoms of achylia include bloating, nausea, feeling full quickly, unintentional weight loss, and changes in stool colour or texture. Nutritional deficiencies such as low iron or vitamin B12 are also frequently seen. If you experience these symptoms, speak with your family doctor or visit a walk-in clinic.
Can achylia be treated or reversed?
Treatment for achylia depends on the underlying cause. If H. pylori infection is responsible, antibiotics can often resolve the problem. For autoimmune or pancreatic causes, treatment focuses on managing symptoms and replacing missing enzymes or nutrients rather than reversing the damage.
How is achylia diagnosed in Canada?
Achylia is typically diagnosed through blood tests, stool tests, gastric acid analysis, and endoscopy. Your family doctor can order initial investigations, and most of these tests are covered under provincial health plans. If needed, you may be referred to a gastroenterologist for further assessment.
Is achylia the same as low stomach acid?
Achylia and low stomach acid (hypochlorhydria) are related but not identical. Hypochlorhydria means reduced stomach acid, while achylia refers to the near-complete or total absence of all digestive secretions. Achylia is generally considered a more severe condition that requires thorough medical investigation.
Key Takeaways
Achylia is the significant reduction or complete absence of digestive secretions from the stomach or pancreas.
Common causes include H. pylori infection, autoimmune gastritis, chronic pancreatitis, ageing, and stomach surgery.
Symptoms include bloating, weight loss, changes in stool, and nutritional deficiencies such as low iron and vitamin B12.
Diagnosis involves blood tests, stool tests, gastric acid analysis, and endoscopy.
Treatment targets the underlying cause and may include antibiotics, enzyme replacement, dietary changes, and nutritional supplements.
If you notice persistent digestive symptoms, speak with your family doctor or visit a walk-in clinic — most visits are covered by your provincial health plan.
Always consult a healthcare professional before changing your diet or starting new supplements.
