Ginger:  Ginger is a natural antihistamine and decongestant. It may provide some relief from allergy symptoms by dilating constricted bronchial tubes.

Apples:  Some foods, including apples, contain the flavanoid, quercetin that can cross-react with tree pollen. Quercetin can reduce allergic reactions by having an antihistamine effect. It also decreases inflammation. Quercetin occurs naturally in certain foods, such as apples (with the skin on), berries, red grapes, red onions, capers, and black tea.

Carrots: Carotenoids are a family of plant pigments that include beta-carotene. A lack of carotenoids in the diet is thought to promote inflammation in your airways. Good sources of carotenoids include apricots, carrots, pumpkin, sweet potato, spinach, kale, butternut squash, and collard greens.

Omega-3: Omega-3 essential fatty acids can counter the formation of chemicals that cause inflammation of the air passages. Good natural sources include flaxseed oil and salmon.

Yogurt: Food sensitivities seem to be connected with seasonal allergies. In a study conducted at the University of California, patients who were fed 18 to 24 ounces of yogurt a day experienced a decline in their environmental allergic symptoms by 90 percent.

Fiber: A healthy and active colon can decrease food sensitivity, which, in turn, can lighten the burden on your immune system and may reduce the impact of seasonal allergies. For maximum colon health, increase the fiber in your diet.