Stability of B-Complex Vitamins in Extruded Catfish Feeds

The stability of the B-complex vitamins thiamin mononitrate, riboflavin, pyridoxine hydrochloride, niacin, and pantothenic acid was determined during extrusion processing and drying of catfish feed. Riboflavin, pantothenic acid, and niacin had retention values of l00%, l00%, and 96.3%. respectively, under conditions typical of that for processing catfish feed. Thiamin mononitrate and pyridoxine hydrochloride were relatively stable, having retention values of 65.1% and 70.3%, respectively. Results from this study should be usefhl in modifying catfish vitamin premixes.