Allergic rhinitis is an allergic reaction that occurs when a person's immune system reacts harshly to inhaled substances such as dust mites, pollen, pet dander and mold. According to the University of Maryland Medical Center (UMMC), allergic rhinitis affects approximately one in five Americans. It may occur seasonally or perennially and symptoms resemble those of a cold. In addition to avoiding allergens and medical treatments, certain nutrients may help prevent or reduce allergic rhinitis symptoms.
Vitamin C
Vitamin C, also known as ascorbic acid, is a water soluble vitamin with antioxidant, or disease-fighting, properties. The UMMC suggests 2,000 milligrams (mg) per day for people with allergic rhinitis, due to the nutrient's antihistamine capabilities. Vitamin C is found naturally in numerous foods, is added to others and can be acquired through dietary supplementation. Vitamin C-rich food sources include citrus juices, oranges, grapefruits, tangerines, strawberries, tomatoes, sweet bell peppers, kiwi, papaya, broccoli and potatoes.
Quercetin
Quercetin is a plant-based chemical (flavonoid) that gives color to fruits and vegetables. Though additional research is needed, quercetin is believed to hold powerful antioxidant properties and may help reduce inflammation, runny nose and watery eyes associated with allergic rhinitis. Food sources of quercetin are vast, and include leafy green vegetables, berries, apples, onions, tea and red wine. Quercetin supplements are also available. According to the American Cancer Society, quercetin dietary supplements provide between 50 and 500 mg of the nutrient--far denser amounts than found in food sources. At this point there are no recommendations regarding standard quercetin dosage.
Lactobacillus Acidophilus
Probiotics are healthy bacteria known to support digestive health and immune system function for people taking antibiotic medications. Research published in the Lancet in 2003 showed a positive correlation between a probiotic called lactobacillus acidophilus and reduced allergic rhinitis symptoms, such as atopic dermatitis (a scaly skin rash). In particular, the UMMC indicates that lactobacillus acidophilus may help reduce allergic reactions to pollen. Lactobacillus acidophilus is prevalent in cultured dairy products, such as yogurt, kefir and buttermilk and in fermented soy products and fortified beverages. Probiotics can also be attained through dietary supplementation.
