Celiac Disease & Gluten-Free Diet

Gluten is just an ingredient in bread for most people, but for millions worldwide it represents a chronic autoimmune condition (celiac disease) that radically changes their daily lives. In this article, we’ll explore what gluten is, how it’s connected to celiac disease, the associated symptoms and diagnostic process, and how strict avoidance of gluten can significantly improve the quality of life for those affected. We’ll also discuss how specialty stores, such as Biologiko Chorio, support the safety and well‑being of individuals with celiac disease.

What is gluten?

Gluten is the general term for storage proteins found in the endosperm (the interior part of the grain) of many cereals—such as wheat and its varieties (spelt, einkorn), rye, and barley. It’s a complex protein composed of multiple subunits.

The proteins that make up gluten

The main groups are prolamins, rich in the amino acids proline and glutamine (hence their name), and glutelins. In wheat, prolamins are called gliadins; in rye, secalins; and in barley, hordeins.

What role does gluten play in food?

Gluten gives dough its elasticity, helping it rise and hold its shape, and gives the final product a chewy texture. However, this same protein triggers a cascade of reactions in people with celiac disease.

Which foods naturally contain gluten?

Gluten is naturally present in these families of grains:

• Wheat and its varieties (e.g., spelt, einkorn)
• Rye
• Barley

Any food made with these grains or their derivatives—such as cookies, croissants, pasta, cakes, even beer—contains gluten.

Gluten traces may also be found in foods that are naturally gluten‑free—like rice, oats, corn, or quinoa—if cross‑contamination occurred during processing.

When does gluten become a problem?

While most people can eat gluten with no issue, certain individuals must avoid it entirely or limit their intake:

1. Celiac disease: An autoimmune disorder where gluten intake causes inflammation and damage to the small intestine’s lining. People with celiac must completely and permanently exclude gluten (and any traces) from their diets.

2. Non‑celiac gluten sensitivity: Individuals without celiac disease but who experience gastrointestinal or other symptoms after eating gluten. They may tolerate small amounts but react to more concentrated sources.

3. Wheat allergy: An immune response to wheat proteins (which can include gluten). People with a wheat allergy usually only need to avoid wheat, not necessarily all gluten‑containing grains. It’s more common in children and often resolves by around age six.

Which foods must be avoided?

Those who need to adjust their diets should exclude or limit:

• Foods made from wheat, rye, and barley
• Any items possibly cross‑contaminated with gluten—especially crucial for people with celiac disease
• Shared utensils and surfaces (like toasters, pans) that may contact gluten-containing products—again, critical for celiac individuals

How do I know if I have celiac disease or simply gluten sensitivity?

Diagnosis of celiac disease requires more than suspicion or symptoms. It involves blood tests (for specific antibodies), endoscopy, and ruling out other causes. If you experience frequent digestive issues, chronic fatigue, or unexplained skin rashes, consult a gastroenterologist before removing gluten from your diet on your own.

What does “gluten‑free” really mean—and how do I read labels?

A “gluten-free” label doesn’t just mean “wheat-free.” It legally indicates the product contains less than 20 ppm of gluten, per international standards. Careful label reading is essential: look for official certification, warnings about cross-contamination, and phrases like “may contain traces of gluten.”

Is a gluten‑free diet healthier overall?

Many consumers assume gluten-free products are healthier—but gluten removal doesn’t guarantee less sugar, fat, or calories. In fact, many gluten‑free items contain added starches or sweeteners to improve texture and taste. A critical eye and balanced choices are needed.

Gluten‑free grain alternatives

If you need to follow a gluten‑free diet, there are many nutritious substitutes that provide carbohydrates and fiber:

• Quinoa
• Rice
• Corn
• Buckwheat
• Amaranth
• Green banana flour
• Brown rice millet

Extra: Easy and Delicious Soft Gluten-Free Cookies

Biologiko Xorio and gluten‑free products

At Biologiko Chorio, you’ll find a wide range of specialty diet products—including gluten‑free items that are high-quality and safe, with clear “gluten-free” labels. This is especially important for people with celiac disease and for parents feeding children with the condition, providing peace of mind regarding product safety.

Because caring for our health means paying attention to what we eat!

Efi Koloverou
Clinical Dietitian
Specialization: Obesity - Diabetes
Doctor of Harokopio University