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Hair Follicle Drug Testing

Introduction to Hair Follicle Drug Testing

Hair follicle drug testing is an essential resource for ensuring safety and compliance in diverse settings, including workplaces and clinical environments.

At MHE Labs, we offer a range of precise, dependable drug screening techniques. Hair follicle testing is a critical method for detecting a broad spectrum of substances.

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Benefits of hair follicle drug testing

Longer Testing Window

Hair follicle testing can detect drug use over long period, typically up to 90 days. This makes it highly effective for identifying long-term patterns of drug use rather than just recent consumption.

Difficult To Adulterate

Since the sample collection is directly observed and the hair is taken from the head or body, it’s much harder for the test subject to tamper with the sample. This ensures a higher level of integrity and reliability in the testing process.


Hair follicle tests can detect a wide range of drugs, including but not limited to marijuana, cocaine, opiates, methamphetamine, and ecstasy. This makes it a comprehensive tool for drug testing across various contexts.

How Hair Follicle Drug Testing Works

Hair follicle drug testing is a straightforward and efficient method for detecting the presence of drugs and their metabolites in the body. Here’s a brief overview of the process:


A small sample of hair, usually about a pencil-width in diameter, is cut close to the scalp from the crown area of the head. This sample typically consists of 100 to 120 strands of hair. If hair from the head is not available, body hair can also be used.


The hair sample is then sent to our laboratory where it is tested for drug metabolites. The testing process usually involves dissolving the hair and using techniques such as Enzyme-Linked Immunosorbent Assay (ELISA) followed by Gas Chromatography-Mass Spectrometry (GC-MS) for confirmation.


The final step is reporting the results. If the test detects drug metabolites above a threshold, the result is returned as positive. If no drugs are detected, or the levels are below the threshold, the result is negative. The outcome is communicated to the employer, legal entity, or individual who requested the test.

This method is highly effective and can detect a range of substances quickly and accurately.

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