Hair drug testing

Our accredited hair drug & alcohol testing service is simple to understand, simple to organise and delivers comprehensive results - simply presented.

We provide the analytical quality you would expect from one of the UK’s largest providers of forensic testing to the police, and a level of customer service and support that is second to none.

With transparent pricing, a network of professional sample collectors, rapid appointment scheduling and UKAS accredited laboratory analysis our service is designed to make the process as easy as possible.

Simple yet comprehensive

  • Accredited testing
  • Step 1
  • Step 2
  • Sampling
  • Alcohol
  • ISO17025 Accredited Laboratory

    Cellmark’s ISO17025 accredited hair drug & alcohol testing service provides rapid, reliable scientific analysis which is clearly reported and simply explained.

    We are also one of the largest suppliers of forensic analysis to the police and the UK’s leading DNA paternity tester with 30 years’ experience of delivering market leading scientific testing to the general public, the legal community and the courts. We bring the same level of scientific rigour, chain of custody management and excellent customer support to all the services we provide – reliable quality from the name you can trust.

    Details of Cellmark’s ISO17025 schedule of accreditation can be found at

  • Select the drugs you want us to test for

    Cellmark tests for more than 25 common ‘drugs of abuse’ and drug metabolites (breakdown products) which can be selected as the following 10 drugs and drug groups:

    • Amphetamine and methamphetamines - including MDMA (ecstasy)
    • Benzodiazepines - including diazepam, desmethyldiazepam (nordiazepam), temazepam, oxazepam and chlordiazepoxide
    • Cannabis
    • Cocaine - including markers to indicate the use of ‘crack’ cocaine and the concurrent use of cocaine and alcohol
    • Ketamine
    • LSD
    • Mephedrone
    • Methadone
    • Opiates – including morphine, codeine, dihydrocodeine, heroin and markers of heroin use
    • Phencyclidine (PCP)


    Our service is designed to comply with the legal aid funding guidelines and is simple and economic.

    Simply select one, two or even three named drugs/drug groups from the list if that is all you need, but if you don’t know which drugs could have been taken, or if you need to test for more than three named drugs then we will run and report our entire panel, which then becomes the most economic option.

    Our four stage pricing structure is simple and easy to understand:

    • Price A: 1 drug/drug group
    • Price B: 2 drugs/drug groups
    • Price C: 3 drugs/drug groups
    • Price D: ALL 10 drugs/drug groups


    We will give you an immediate quote over the telephone and if you want to go ahead we will take all your details there and then to avoid any delays.

  • Select the period of time you want to be analysed

    Head hair grows at an average rate of approximately one centimetre (cm) per month with a range of between approximately 0.7 and 1.5cm per month. At Cellmark we assume a growth rate of 1cm per month for our calculations when determining a history of use.

    You can ask us to analyse either a single section of head hair, or multiple ‘sections’. A single section provides an overview for that period of time and can be between 1 and 3cm (ie one, two or three month periods) to demonstrate patterns of drug use or abstinence over a period of time. The number of sections that can be tested will be dependent upon the length of sample available.

  • Hair strand sampling

    Hair strand sampling is best conducted by a person who has been specifically trained. Cellmark uses a dedicated sampling service whose samplers are skilled in taking all types of sample.

  • Alcohol consumption testing

    Cellmark offers an equally simple alcohol testing service to test for "chronic excessive alcohol consumption". Visit our dedicated alcohol testing page for full details.

“Our accredited hair drug & alcohol testing service is simple to understand, easy to organise and delivers comprehensive results.”

Useful links

From ensuring that you have the right information before commencing the process to understanding what the final test report means - we aim to provide assistance every step of the way.