The quality of allergy tests greatly depends on the antigens used. Antigens are extracted and purified from specific allergens. The compositions of these antigens are unstable; therefore require to be standardized through a long series of steps. The cost of good antigen is high in order to provide more accurate allergy tests.
The quality of the allergen & antigen producing companies in the market may vary. Consumers must choose carefully and ensure the company has a good and long history of production. More importantly, allergy tests must be supported by academic literatures.
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