Allergies are an overreaction of the body's immune system to particular substances. Symptoms vary between individuals and can range from minor irritation to life-threatening emergencies. While allergies cannot be cured, treatments can help reduce symptoms. Nutritional supplements like vitamins A, C, E, minerals, and omega-3 fatty acids as well as natural remedies like ginger, honey, and turmeric can help manage allergy symptoms. Maintaining a healthy diet, lifestyle, and environment can also help prevent allergic reactions.