Clarifying Terminology through the AMSA Meat Lexicon: Addressing the Ultra-processed Foods Debate and Its Implications for Shelf Life, Food Waste, and Nutrition

The term “processed meat” lacks a consistent scientific and regulatory definition, contributing to confusion among researchers, policymakers, industry stakeholders, and consumers. Divergent classification systems – ranging from regulatory standards to epidemiological frameworks such as ultra-processed food models – often group products according to presence or number of ingredients or degree of industrial manipulation rather than mechanistic changes to structure, function, composition, or safety attributes. This inconsistency has complicated risk communication, obscured distinctions between preservation and formulation, and limited meaningful dialogue regarding meat’s role in human nutrition. The American Meat Science Association (AMSA) Meat Lexicon provides standardized, science-based terminology describing postmortem muscle biology, fabrication, processing methods, and value-added interventions. Leveraging this framework offers an opportunity to more precisely define processed meats based on physical, chemical, and biological modifications to raw muscle tissue. This presentation examines how common meat processing interventions – including grinding, curing, fermentation, thermal processing, and packaging technologies – affect safety, shelf life, sensory quality, and nutrient stability. Importantly, many preservation strategies categorized as “ultra-processed” within broad dietary classification systems are designed to enhance microbial safety, extend product shelf life, and reduce food waste without diminishing protein quality or micronutrient density. Ingredient-based classification systems frequently conflate minimally processed and extensively processed products, failing to account for mechanistic differences or functional intent. As a result, preservation technologies that improve sustainability outcomes may be interpreted as markers of reduced nutritional value. Clarifying terminology through the AMSA Meat Lexicon can improve interdisciplinary communication and provide a more scientifically grounded framework for evaluating processed meat products. A science-based definition of processing – anchored in measurable changes to muscle structure, composition, safety, and stability – allows more nuanced assessment of health outcomes, environmental implications, and consumer perception. Advancing consistent terminology is essential to support evidence-based policy, enhance transparency in risk communication, and balance considerations of food safety, shelf life, waste reduction, and nutrient delivery within the broader ultra-processed foods debate.