Description
Hair testing is a method used to detect drug use over a longer period than other testing methods, such as urine or saliva tests. It analyzes a sample of hair to identify the presence of drugs and their metabolites. Here’s a detailed overview of hair testing for drugs:
1. How Hair Testing Works:
- Sample Collection: A small sample of hair is taken from the scalp or body. Typically, 1.5 inches of hair is collected, which can provide a history of drug use for about 90 days. If body hair is used, it can detect drug use over a longer period.
- Washing and Processing: The collected hair is washed to remove external contaminants and then processed to extract the drug metabolites.
- Testing: The extracted sample is analyzed using techniques such as gas chromatography-mass spectrometry (GC-MS) to identify and quantify drug metabolites.
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