In individuals with celiac disease, gluten can trigger an autoimmune response that damages the lining of the small intestine, leading to various gastrointestinal and systemic symptoms. Consuming gluten results in inflammation and malabsorption of nutrients, causing symptoms such as diarrhea, weight loss, and fatigue. Long-term exposure to gluten in these individuals can lead to serious complications, including osteoporosis, infertility, and an increased risk of certain cancers. Therefore, a strict gluten-free diet is essential to manage symptoms and prevent damage to the intestine in individuals affected by celiac disease.