Shelf Life: The Science Behind Food Safety and Quality

A food product’s shelf life is not based on estimation—it is determined through scientific evaluation of how the product changes over time. This process relies on Shelf Life Studies, which assess how long a product remains both safe to consume and able to maintain its quality under defined storage conditions. Product quality is not assessed solely in terms of microbiological safety; it also includes physicochemical stability and the preservation of sensory characteristics, such as taste, texture, and appearance, until the end of the product’s intended shelf life.

These studies follow a structured testing protocol and include microbiological and physicochemical analyses, together with sensory evaluations. The effect of the final packaging is also taken into account, as different packaging materials can significantly influence the shelf life of the same product.

For products with a long expected shelf life, Accelerated Shelf Life Studies are used. These studies simulate more demanding storage conditions, allowing product performance to be evaluated over a shorter period while providing valuable information about its long-term stability. Based on the results of these assessments, manufacturers can determine whether a product should carry a “Expiry” date, which relates to food safety, or a “Best Before” date, which indicates the period during which the product is expected to retain its optimal quality.

At QACSFOOD, shelf life evaluation is part of our comprehensive R&D Support services. Our approach combines Shelf Life Studies, Food Stability Studies, Packaging Compatibility Testing, Sensory Evaluation, and specialized laboratory analyses to provide food manufacturers with reliable scientific data. This enables them to establish shelf life with confidence, document product safety, and develop high-quality products that meet both regulatory requirements and market expectations.

In this presentation, Ioanna Vasilakopoulou, Food R&D Support Specialist at QACSFOOD, explains the scientific approach behind determining the shelf life of food products. She discusses how Shelf Life Studies, Food Stability Studies, and laboratory testing contribute to documenting product safety, preserving quality, and strengthening commercial reliability.

Listen the full presentation here.