It is a way to test and treat patients for allergies. During P/N testing it is possible to reproduce and then eliminate a persons specific symptoms. It is therefore very helpful in pinpointing cause and effect relationships so someone can identify exactly which exposure to an allergenic substance is causing which specific symptoms. Environmental medical specialists, often also certified in pediatrics or internal medicine, know how to do this testing.
Part of video series produced by the Health Research Foundation, Doris Rapp M. D. and Green Health Media.
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