What Is Celiac Disease?

Definition and Overview

Celiac disease, also known as gluten-sensitive enteropathy or celiac sprue, is an autoimmune disorder that impacts the digestive system. The ingestion of gluten, a protein found in certain grains such as barley, wheat, rye, and oats, triggers damage to the lining of the small intestine. This damage impairs the intestine’s ability to absorb essential nutrients, including iron, calcium, folate, and fats.

Causes of Celiac Disease

Immune System Response

The immune system plays a crucial role in defending the body against foreign invaders like bacteria, viruses, and parasites. In individuals with celiac disease, the immune system mistakenly reacts to gluten by producing antibodies. These antibodies target the intestinal lining, leading to inflammation and damage to the villi—small, hair-like structures responsible for nutrient absorption. When villi are damaged, nutrient absorption is significantly reduced, resulting in malabsorption.

Symptoms of Celiac Disease

Symptoms of celiac disease can vary widely among individuals and may include:

  • Digestive issues such as pain, diarrhea, gas, bloating, and pale stools
  • Severe skin rash (dermatitis herpetiformis)
  • Anemia (iron deficiency)
  • Fatigue
  • Headaches
  • Muscle cramps
  • Joint and bone pain
  • Seizures
  • Weight loss
  • Tingling sensations in the hands, feet, or legs due to nerve damage and low calcium levels
  • Mouth ulcers
  • Damaged teeth
  • Acid reflux and heartburn
  • In women, irregular menstrual periods
  • In children, issues with growth and development

Complications of Celiac Disease

Celiac disease can lead to several complications, including:

  • Malnutrition
  • Osteoporosis due to poor calcium and vitamin D absorption
  • Lactose intolerance from villi damage
  • Infertility and miscarriage in women due to nutrient deficiencies
  • Birth defects related to folic acid deficiency during pregnancy
  • In rare cases, intestinal cancer (intestinal lymphoma and small bowel cancer)

Additionally, celiac disease may coexist with other autoimmune conditions, increasing its likelihood. These include:

  • Type 1 diabetes
  • Rheumatoid arthritis
  • Lupus
  • Thyroid disease
  • Sjögren’s syndrome, which reduces moisture production in glands

Diagnosis of Celiac Disease

To diagnose celiac disease, a healthcare provider will conduct a physical examination and review the patient’s medical history. Blood tests may be performed to check for elevated antibody levels associated with the disease. Further assessments can include tests for nutrient deficiencies, such as iron levels, and stool samples to identify fat presence due to decreased fat absorption. A biopsy may also be conducted, where an endoscope is used to gather a sample from the small intestine to evaluate villi damage.

Treatment of Celiac Disease

Individuals with celiac disease must adhere to a strict gluten-free diet, avoiding foods containing wheat, rye, barley, and oats. Upon eliminating gluten, symptoms typically improve and may resolve within approximately six months. It is essential to maintain this diet permanently, as gluten consumption will trigger a return of symptoms.

In cases of extensive intestinal damage prior to diagnosis, a gluten-free diet alone may not suffice. Supplementation with vitamins and minerals such as zinc, vitamin D, calcium, vitamin K, vitamin B-12, and folate may be necessary, either through oral pills or intravenous administration. For those experiencing dermatitis herpetiformis, a skin medication called dapsone may be prescribed.

Considerations for a Gluten-Free Diet

Transitioning to a gluten-free diet requires significant changes in eating habits, including the removal of common staples such as cereals, bread, and pasta. It is vital to carefully check labels on packaged foods for gluten-containing ingredients and to inquire about ingredients when dining out.

A balanced gluten-free diet can include specially made gluten-free breads and pastas, as well as foods made from gluten-free flours such as corn, soy, rice, or potato flours. Naturally gluten-free options like fruits, vegetables, meats, and poultry are also suitable. Consulting with a dietitian can help create an appropriate eating plan tailored to individual needs.

Further Reading on Celiac Disease

Written By: Anna Zhou