During pelleting, processing parameters like steam conditioning, residence time and pressure can influence the MR,resulting in a decrease in RL and an increase in the formation of MRPs. Pelleting is a processing technique in which mashconditioning, agglomeration (pelleting) and subsequent cooling take place. Mash conditioning includes heat, water andpressure, often combined in the form of steam, to induce softening of the food, denaturation of proteins and gelatiniza-tion of starch before the product enters the pellet press (Abdollahi et al., 2013). After conditioning, the mash is compactedand pressed through a die using rollers in the pellet press.