Celiac disease is a chronic autoimmune disorder that affects the small intestine. It is triggered by the consumption of gluten, a protein found in wheat, barley, and rye. When people with celiac disease eat gluten, their immune system reacts abnormally, damaging the lining of the small intestine. This damage can interfere with nutrient absorption and lead to various health problems.

What Causes Celiac Disease?

The exact cause of celiac disease is not fully understood, but it is believed to involve a combination of genetic and environmental factors. People with a family history of the disease are at higher risk. Certain genes, such as HLA-DQ2 and HLA-DQ8, are commonly found in individuals with celiac disease. Environmental triggers, like infections or stressful events, may also play a role in its development.

Genetic Factors

Genetics play a significant role in celiac disease. Most individuals with the condition carry specific gene variants. If a family member has celiac disease, others in the family are more likely to develop it as well. Genetic testing can help identify susceptibility, but a diagnosis requires additional clinical evaluation.

How Celiac Disease Affects the Small Intestine

When someone with celiac disease consumes gluten, their immune system mistakenly attacks the small intestine's lining. This lining contains tiny finger-like projections called villi, which are essential for nutrient absorption. Damage to the villi leads to a condition called villous atrophy, reducing the intestine's ability to absorb nutrients effectively.

Effects of Intestinal Damage

  • Malnutrition due to poor absorption of vitamins and minerals
  • Diarrhea, bloating, and abdominal pain
  • Weight loss and fatigue
  • Delayed growth in children
  • Increased risk of other autoimmune disorders

Over time, persistent damage can lead to complications such as osteoporosis, anemia, and neurological issues. Early diagnosis and a strict gluten-free diet are essential to prevent long-term health problems and allow the intestine to heal.