Another allergy season is back! By this time, you've survived outdoor molds and tree pollens. Next - grass, then ragweed. Of course there are the on-going issues of dust, dust mites and indoor molds among others. Actually, these environmental substances are triggers - if you suffer from allergies, it's your internal environment that causes the problem rather than the external environment. Food is another source of allergies that can result in a wide variety of symptoms.