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An out-of-specification laboratory result should be treated as a quality question requiring investigation, not simply as a reason to repeat the test.
Review:
Ask whether the submitted sample adequately represented the lot.
Could an ingredient explain the result?
Consider:
A microbiology failure may require a different investigation from a heavy-metal or composition failure.
Possibly—but only if additional testing addresses a defined investigative question.
PBR's decision framework explicitly cautions against using laboratory testing without considering the specification, detection limit, sample and decision rule.
Speak with PBR about the failed result and the decision your follow-up testing needs to support.