How does the Hair Drug test work?
Since the bloodstream carries nourishment to produce new hair, scientists are able to identify the ingestion of drugs of abuse by simply analyzing a hair sample. Using Enzyme-Linked Immunosorbent Assay (ELISA) methodology and a variety of mass spectrometry techniques, scientists measure the drug molecules embedded inside the hair shaft. Through this method, which has been approved by multiple accrediting agencies, any chances of external contamination are totally eliminated. In fact, hair testing results cannot be altered through the use of shampoos or any other external contaminants or chemicals.