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However, some individuals may respond to many common environmental antigens. In atopic individuals, non-parasitic antigens stimulate inappropriate Ig E production, leading to type I hypersensitivity.Sensitivities vary widely from one person (or other animal) to another.A very broad range of substances can be allergens to sensitive individuals.Food allergies are not as common as food sensitivity, but some foods such as peanuts (a legume), nuts, seafood and shellfish are the cause of serious allergies in many people.
These include peanuts, tree nuts, eggs, milk, shellfish, fish, wheat and their derivatives, and soy and their derivatives, as well as sulfites (chemical-based, often found in flavors and colors in foods) at 10ppm and over. It should be noted that other countries, in view of the differences in the genetic profiles of their citizens and different levels of exposure to specific foods due to different dietary habits, the "official" allergen list will change.Also, depending on the season, the symptoms may be more severe and people may experience coughing, wheezing, and irritability.A few people even become depressed, lose their appetite, or have problems sleeping.Various trees and wood products such as paper, cardboard, MDF etc.
can also cause mild to severe allergy symptoms through touch or inhalation of sawdust such as asthma and skin rash.16 states in the United States were named as “Allergen Hotspots” for large increases in allergenic tree pollen if global warming pollution keeps increasing.