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Understanding Why Hair Testing Is Used When alcohol testing is required, one of the first questions is often not how the test works, but why this particular test has been recommended. The answer depends on what information is needed. If […]

Understanding Your Options Before You Book People choose to book private drug testing for many different reasons. For some, it's about seeking reassurance for themselves or a family member. Others require testing to support legal proceedings, safeguarding decisions, workplace policies […]

Understanding the Role of the Testing Provider Being asked to complete a drug or alcohol test as part of legal proceedings can feel unfamiliar and, in some cases, overwhelming. It's natural to have questions about why the test has been […]

It is set to be a busy autumn for Certis BioLabs, with our team attending events across the UK in Autumn 2026. Our team will be available to discuss your testing requirements, and answer your questions.

In some circumstances, passive exposure may occur without an individual being aware. Individuals may raise concerns about whether being around someone using drugs, or being in an environment where substances are present.

The detection window for drug, alcohol marker or related substance can vary depending on the substance, the sample type, the individual being tested and is not an exact timeline.

How long drugs or alcohol remain detectable depends on several factors, including the substance involved, the sample type analysed and individual circumstances.

Terms such as “false positive” and “false negative” often cause confusion from not recognising the different stages of testing and how results are confirmed and interpreted.