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A high microbial count creates an important quality question:
Is the result associated with the ingredient, supplier, manufacturing process, storage, product formulation or sampling?
Simply repeating the same test may reproduce the result without explaining the cause.
Determine whether the result involved:
Confirm:
Ask:
An unexpected result may reflect genuine variability within the product.
Consider:
Raw-material testing may help determine whether an ingredient could be contributing to the finished-product result.
Potential contributors may include:
The laboratory result does not identify which source is responsible.
Where relevant, these measurements may provide useful supporting information.
They do not replace microbiological testing.
Related Service: Supplement Moisture & Water Activity Testing
Potentially—but define what the retest is intended to determine.
Repeating the same retained sample asks whether the result is reproducible in that material.
Testing another finished-product unit asks whether the result occurs elsewhere.
Testing ingredients asks whether raw materials may contribute.
Those are different investigation questions.
Review:
Review:
A high count does not identify which organisms are responsible.
A later passing result does not automatically prove the original result was incorrect.
Different product units or samples may genuinely contain different microbial populations.
Review the sampling plan, production lot and product variability.
The submitted sample exceeded the applicable microbial-count criterion or specification.
Not without defining what the follow-up testing needs to determine.
Potentially, if an ingredient source is a plausible contributor.
They may provide useful supporting information but do not replace microbiology.
Tell PBR the test, result, specification, product matrix and what you are trying to determine next.