The traditional samples for drug and alcohol testing are blood and urine.
These provide evidence for cases where we require an indication of exposure to drugs and alcohol in a very recent time frame.
These samples have what is referred to as a ‘window of detection’.
This is a timeframe over which that sample can demonstrate exposure to drugs or alcohol.
The window of detection for blood is often measured in hours and urine can show evidence over a few days – possibly a few weeks.
By contrast hair can show a retrospective history of your drug or alcohol consumption (or abstinence) over many months.
This level of information makes hair testing invaluable in a wide variety of legal scenarios.