The collagen fibers and collagen powder are produced from scrap pieces of dermis and subcutaneous tissue that are by-products of leather tannery, which were previously subjected to chemical treatment for delipidation, dried at a mild temperature and ground. During the last step, two fractions are generated according to the particle size as follows: the finer fraction is classified as collagen powder, and the coarser fraction corresponds to collagen fibers (NovaProm, 2006).
Due to low production cost and functional properties of collagen fiber, the incorporation of collagen fiber as an additive offers an alternative to recover product texture in products formulated with high MDPM concentrations resulting in an improved bite or snap. Moreover, with the low cost of collagen fiber, it also fits into the economical context. Thus, the objective of this study was to evaluate the effect of varying MDPM and collagen fiber concentrations on the quality of emulsion-type sausages and to examine their role in