Glutine

Glutine is a group of storage proteins found in the seeds of certain cereals, most notably wheat, and to a lesser extent in related grains. In wheat, the gluten complex consists mainly of gliadins and glutenins. Barley contains hordeins and rye contains secalins, which are similar protein families. Oats contain avenins, which are related but not always classified as gluten; some individuals with gluten-related disorders may react to oats depending on processing and purity.

When flour is mixed with water and kneaded, gluten proteins form a viscoelastic network that traps gas released during fermentation. This network gives dough its elasticity and strength, helping bread and other baked goods rise and develop a characteristic chewy texture. The exact behavior of gluten depends on the cereal source, cultivar, milling, processing, hydration, and additives used.

Glutine is widely used in food production as a binder, stabilizer, and texturizer. It is a major component of many bread products, pastas, and processed foods, but it can also appear in sauces, soups, and vegetarian products. Because gluten-containing grains are common, many foods are naturally not gluten-free, and cross-contamination can be a concern in facilities that process gluten-containing ingredients. Labeling rules in many regions require disclosure of gluten presence or potential contamination.

Health considerations include celiac disease, an autoimmune condition in which gluten triggers intestinal damage and malabsorption in about 1% of the population. Other individuals may have non-celiac gluten sensitivity or wheat allergy. A gluten-free diet excludes wheat, barley, and rye; oats may be included only if certified gluten-free to avoid cross-contact. Nutritional planning is important on a gluten-free diet to maintain a balanced intake of fiber, vitamins, and minerals.