Start from the risk question
Describe the ingredient, growing or sourcing context, processing and intended market. A focused testing plan is more useful than an undefined request to test for every possible contaminant.
Keep targets explicit
The analyte list, matrix and reporting limits determine what a panel covers. If the concern involves pesticides, mycotoxins, elements or another contaminant class, define the particular targets and purpose before collection.
Separate composition and contamination
Nutrition measurements do not substitute for a contaminant screen. Likewise, one contaminant result does not describe the rest of the food’s composition or microbial condition.
Plan the interpretation
Bring the specification or customer requirements to the scope discussion. The result should be reported on a basis that supports the actual decision rather than a generic pass label.
Related testing & guidance
Technical & service references
Vanguard food & beverage servicesFDA: Bacteriological Analytical ManualVanguard nutrition & proximate analysisSource review: November 8, 2026. The agreed method and project scope govern the testing.