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Talk to a SpecialistTalk to a SpecialistRhyz Analytical Labs, a contract testing laboratory, received a warning for adulterated drug products due to Current Good Manufacturing Practice (CGMP) violations in its testing operations. FDA inspectors found that the company failed to thoroughly investigate unexplained discrepancies and microbiological test failures, instead repeatedly accepting inadequate root cause analyses attributed to "unknown laboratory error" and relying on retest data without sufficient scientific justification. The facility conducted chemical and microbiological testing of over-the-counter drug products for customers but lacked proper corrective and preventive action procedures to address contamination events and ensure product safety.