The same antioxidants also were identified in extruded products, and their concentrations were compared with those in unprocessed blends, as calculated from individual ingredients(Tables II-IV). It was obvious that extrusion caused a re duction in concentrations of both pheno lic compounds and carotenoids. Chloro genic acid and B-carotene were the most susceptible to extrusion, especially at higher process temperatures. Degradation due to thermomechanical treatment dur ing extrusion might be one reason for the loss of detectable antioxidants and was anticipated. However, antioxidant activity data were surprising(discussed below)