Hair testing is primarily used to detect first-hand use of a substance. However, there is also a test that can check to see if someone is being exposed to drug use second-hand. It’s commonly used to test children who may be living a drug related environment, but it can be performed on almost anyone. The test will detect first-hand use as well, and it will differentiate between the two so you know exactly what type of drug use is occurring.
***May not provide a full 90 day detection window, as normal hair washing/daily exposure may remove traces of drugs/metabolites on outside of hair strand***