Ultra-Processed vs Minimally Processed Pet Foods

Evidence Breakdown

 

Definitions of Food Processing

​

Food processing classification most commonly relies on the NOVA framework, which categorizes foods by extent and purpose of industrial processing rather than nutrient composition (Monteiro et al., 2019). Ultra-processed foods involve multiple industrial steps, formulation with extracted ingredients, and incorporation of additives intended to modify texture, flavor, or shelf stability. Alternative classification systems exist, though definitional variability persists across disciplines (Medin et al., 2025). In companion animal nutrition, terminology surrounding raw, minimally processed, and biologically appropriate diets remains inconsistent (Kiprotich et al., 2025).

 

Nutrient Matrix Alteration and Processing Byproducts

 

Ultra-processing alters food structure, disrupts naturally occurring nutrient matrices, and promotes the formation of compounds such as advanced glycation end products through high-temperature extrusion or rendering processes (Raditic et al., 2021). Experimental food analyses show higher antioxidant content in minimally processed foods than in ultra-processed foods across large datasets, though these findings originate from human food systems (Basile et al., 2024).

 

Controlled Evidence

 

A controlled canine feeding trial evaluated four diets differing in processing intensity and identified statistically significant differences in plasma and urinary advanced glycation end products as well as soluble receptor for advanced glycation end products concentrations in healthy dogs (Bridglalsingh et al., 2024). The study design controlled for subject health status but did not evaluate clinical disease endpoints.

 

Randomized crossover studies in humans demonstrated higher energy intake and adverse cardiometabolic markers during exposure to ultra-processed diets compared with minimally processed diets matched for calories, macronutrients, fiber, and sodium (Dicken et al., 2025). These findings reflect high internal validity but originate outside veterinary populations.

 

Observational and Population-Level Evidence

 

Meta-analyses and umbrella reviews of observational human studies consistently associate ultra-processed food consumption with obesity, cardiovascular disease, chronic kidney disease, and all-cause mortality (Elizabeth et al., 2020; Dai et al., 2024; Leonberg et al., 2025). These findings reflect population-level associations rather than causal relationships.

 

Behavioral and neurobiological studies report heightened reward and approach motivation responses to ultra-processed foods compared with minimally processed foods, potentially mediated by texture, flavor enhancers, and rapid digestibility (Lemos et al., 2022). Consumer perception research demonstrates systematic differences in how ultra-processed foods are conceptualized, independent of nutritional labeling (Ares et al., 2016).

 

Relevance to Pet Food Systems

 

Commercial pet foods frequently meet regulatory nutritional adequacy standards despite wide variability in processing intensity (Raditic et al., 2021). Processing classification does not directly equate to nutrient sufficiency or deficiency. Evidence directly linking processing category to long-term clinical outcomes in companion animals remains sparse. Extrapolation from human literature involves biological, dietary patterns, and lifespan differences.