Define the allergen target
Vanguard’s current allergen page lists egg, milk and selected tree-nut residues, with additional targets scoped on request. State the particular protein or ingredient question rather than requesting an undefined all-allergen panel.
Finished food or cleaning verification
A food sample and a production swab answer different questions. Include the matrix, processing history and whether the purpose is product verification, an investigation or a cleaning assessment.
Choose the sample plan
Representative sampling and the reporting limit matter when interpreting a finding. Describe the ingredient and cross-contact concern so the test is matched to the question.
Keep conclusions bounded
A not-detected result for a specific target and tested portion does not certify the entire product or facility as allergen free. Label and allergen-management decisions require the broader program context.
Related testing & guidance
Technical & service references
Vanguard service detailsSource review: November 8, 2026. The agreed method and project scope govern the testing.