Core Insights - Allergies have become a significant health issue affecting individuals across all age groups, with symptoms ranging from mild to severe [2] - Nutritional strategies are emerging as a crucial third pillar in the prevention and management of allergies, alongside allergen avoidance and medication [1] Group 1: Allergy Symptoms and Impact - Allergies manifest through various symptoms, including sneezing, nasal congestion, skin rashes, and in severe cases, anaphylaxis [2] - The immune system's overreaction to typically harmless substances like dust mites, pollen, and certain foods leads to these allergic responses [2] Group 2: Nutritional Interventions - Nutritional interventions play a multi-dimensional role in allergy management, including enhancing barrier functions and regulating immune responses [3][4] - Specific nutrients such as vitamins and omega-3 fatty acids are essential in reducing inflammation and improving overall immune health [6] Group 3: Key Nutrients for Allergy Management - Four key nutrient categories are vital for individuals with allergies: - **Vitamins**: Vitamin C aids in tissue repair and immune function, while Vitamin A maintains epithelial integrity [7] - **Omega-3 Fatty Acids**: These have significant anti-inflammatory properties and can help prevent bronchoconstriction [7] - **Probiotics**: Beneficial for gut health, they help stabilize the immune system and reduce allergy triggers [8] - **Flavonoids**: Compounds like quercetin can inhibit histamine release, alleviating allergy symptoms [9] Group 4: Dietary Sources - Foods rich in these nutrients include fresh fruits and vegetables for vitamins, deep-sea fish for omega-3s, and fermented products for probiotics [7][8] - Specific foods such as onions, apples, and berries are high in quercetin, which can help manage allergy symptoms [9]