Slicing trims become a food-grade ingredient only through matrix design

New Italian research turns cured-ham slicing trims into a concrete food-upcycling case. Published on 4 September, the study developed six protein-rich bars using 35% Prosciutto di Parma slicing residues, fresh pork, maize and different binding systems. Its starting point is industrially relevant: slicing trims are often directed to lower-value uses even though they contain protein and micronutrients.

The prototypes differed in their maize type—high-amylose yellow, red or blue—and in whether pork gelatine or psyllium fibre was used. After baking for 2.5 hours at 110 °C, the researchers measured composition, in-vitro protein digestibility, carbohydrate digestion and amino-acid profiles. Protein content ranged from 26.7% to 38.1%, and the authors concluded that all prototypes could use the “rich in protein” claim under the criteria they applied.

The technical interest, however, is not simply the concentration of protein. The high-amylose maize prototype with 5% psyllium achieved the best resistant-starch and protein-score values within the series. This illustrates that turning a meat by-product into a food ingredient must be designed as a complete matrix: raw material, texture, digestibility, amino-acid composition and thermal processing are one integrated development decision.