Celiac disease: symptoms, causes and treatment
What Is celiac disease?
Celiac disease is a serious, lifelong condition where the body reacts badly to gluten, a protein found in wheat, barley, and rye.
It is an autoimmune disease, which means the immune system (the body’s defense system) mistakenly attacks the body’s own tissues. In celiac disease, eating gluten causes the immune system to damage the lining of the small intestine.
Although the small intestine is mainly affected, celiac disease can impact many parts of the body, not just digestion.
How common is it?
Celiac disease affects about 1 in 100 people worldwide.
It is:
- More common in women
- More common in people who have a close relative with the disease
The number of people diagnosed has increased over the last 50 years. This is likely because:
- Doctors are better at testing for it
- More people are being screened
- Changes in diet and gut bacteria may play a role
What causes celiac disease?
Celiac disease develops because of a mix of genes and environmental triggers.
1. Genetic risk
Certain genes increase the risk. About 30–40% of people carry these genes, but only about 3% of them actually develop the disease. So having the genes does not mean you will definitely get it, other factors are involved.
2. Gluten triggers the reaction
When a person with celiac disease eats gluten:
- The body reacts to it as if it were dangerous.
- The immune system creates inflammation (swelling and irritation).
- This damages tiny finger-like structures in the small intestine called villi.
Villi are important because they help absorb nutrients from food. When they are damaged, the body cannot properly absorb vitamins and minerals.
Symptoms of celiac disease
Celiac disease can appear at any age, and symptoms vary widely.
Digestive symptoms
- Long-lasting diarrhea
- Bloating
- Stomach pain
- Weight loss
- Pale, greasy, or foul-smelling stools
Symptoms outside the gut
Up to 60% of people have symptoms that are not mainly digestive, such as:
- Fatigue (extreme tiredness)
- Iron deficiency anemia (low iron levels)
- Itchy skin rash
- Weak bones (osteoporosis)
- Headaches or migraines
- Balance or coordination problems
In children
If untreated, children may have:
- Slow growth
- Delayed puberty
- Problems with tooth enamel
How is celiac disease diagnosed?
Because symptoms can look like many other conditions, doctors use several tools:
Blood tests
The first step is usually a blood test that looks for specific antibodies (proteins the immune system makes during the reaction to gluten).
Intestinal biopsy
In adults, doctors often confirm the diagnosis by taking a tiny sample from the small intestine during an endoscopy (a camera test). This checks for damage to the villi.
Sometimes no biopsy in children
In some children, if antibody levels are very high, doctors may diagnose celiac disease without a biopsy.
Genetic testing
Genetic tests can help rule out celiac disease, especially in people who have already stopped eating gluten before testing.
Is there a cure for celiac disease?
There is currently no cure, but the condition can be controlled.
The only proven treatment: strict gluten-free diet
This means completely avoiding:
- Wheat
- Barley
- Rye
- Any foods containing gluten
Even small amounts can cause damage. When the diet is followed strictly:
- Symptoms usually improve
- The intestine can heal
Challenges of a gluten-free diet
Sticking to the diet can be difficult because:
- Gluten is hidden in many foods
- Cross-contamination can happen easily
- Gluten-free foods can be expensive
- The diet may lack certain nutrients like fiber, iron, and vitamin D
New treatments being studied
Researchers are working on additional treatments, such as:
- Enzymes that help break down gluten
- Medicines that block the immune reaction
- Treatments aimed at helping the body tolerate gluten again
These are still being tested and are not yet approved for regular use.
Summary
Celiac disease is a common but complex condition that can affect many parts of the body. Although there is currently no cure, a strict gluten-free diet allows most people to live healthy, symptom-free lives. Early diagnosis and proper management are key to preventing long-term complications. As research continues, new treatment options may become available, offering additional support beyond diet alone.
