A Testkit is the box a customer receives for a test, containing the collection device, the tubes or card, the instructions, an identifier and a return envelope. It is the physical product your customer holds in their hands.
A Testkit is everything a customer needs in order to collect and return a sample, packed into one box. The contents decide how likely a usable sample is, which makes the kit a quality question rather than a packaging question.
Every kit carries an identifier that connects the returned sample to the order, and that identifier is where most of the integration work between two systems happens. A kit also has a shelf life because tubes and additives age, which means stock has to be rotated rather than stored until somebody needs it.
Ask a supplier what is in the box and who assembled it.
In this glossary, White-Label-Kit covers the same box under your own brand, Fulfillment explains who packs and sends it, and Probe describes the sample the kit exists to collect.
This glossary entry is general information, not medical advice, and it is not intended to diagnose, treat or rule out any condition. Discuss your own results with a clinician who knows your history.

Most people judge their health by how they feel, and a feeling is a blurry picture that is easy to read wrong.
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