Define the shelf-life question
Set the proposed duration, finished package, storage conditions and the quality changes that matter. Shelf life is a study over time, rather than a single pH or microbial result.
Choose the study pathway
Real-time studies observe the product under its intended storage conditions. Accelerated work uses selected stress conditions to study change when that approach fits the product. An accelerated model is not equally appropriate for every food or failure mechanism.
Set the endpoints
The agreed plan can combine microbiology, pH, water activity, moisture and quality observations. Products containing fats may need targeted oxidation measurements. Choose endpoints and review criteria before the study begins.
Plan units and time points
Use the formulation and package intended for sale. Each pull needs enough unopened material for its planned analyses. A package or formulation change should be reviewed before applying an earlier study.
Related testing & guidance
Technical & service references
Vanguard service detailsSource review: November 8, 2026. The agreed method and project scope govern the testing.