Hair Drug Tests  – Suitable for Legal Purposes

Purpose: Historical Drug Use  – view list of common drugs we test for.
Detection Period: From 7 Days – 12 Months ago
Source: Head hair or body hair.

Find out about hair alcohol testing.

The Facts:

  • Using a sample of hair, about the thickness of a pencil, allows for a historical overview of drug use.
  • Non-invasive, simple and painless for the donor.
  • All collections are carried out by our trained collectors, who ensure the sample is taken as neatly and discreetly as possible.
  • Testing carried out in our UK laboratory.
  • Very competitively priced.

Reporting – Average or Month by Month?

Following laboratory analysis, we can use a hair sample to report drug usage in two ways:

1. An average of the total period of analysis

An Average of the total period of analysis e.g. 3 cm of hair can demonstrate that an individual took significant quantities of heroin at some point in the last 3 months.

2. A segmented month by month analysis

A segmented month by month analysis e.g. 3 cm of hair taken in October can demonstrate that an individual took significant quantities of heroin in July, but has abstained in August and September.

Why use a hair test?

Drugs have traditionally been measured in urine and more recently saliva samples. However most drugs are only detectable in urine for 2 – 3 days (with the exception of cannabis which may remain detectable for 3 – 4 weeks), and in saliva for up to 48 hours.

On the other hand, drugs incorporated into hair strands will remain there until the hair is cut or falls out – up to 12 months or more. Therefore whilst urine and oral fluid testing will provide only a short detection period, hair testing can provide a drug history of many months.

Global Sample Collection Options

Available 24/7 through our own internally audited and managed network.  Our collection officers are highly trained and fully equipped to perform on site screening and Chain of Custody sample collections.

Our responsive ‘with cause’ call out service delivers in every respect.

Our Sample collection Officers are available within 2 hours of calling the call centre throughout the UK and many worldwide locations.


  • Body hair cannot show a month by month analysis
  • Your donor will need sufficient hair, around the width of a pencil, more for month by month analysis.

Find out more about hair drug testing on our frequently asked questions page.

You also may like to find out more about our oral fluid tests or urine tests.