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Th e objective of this study was to evaluate the effects of feeding NaturSafe® and the potential impact on meat quality characteristics in beef. Steers were fed one of five diets: a control with dietary antibiotics, a control without dietary antibiotics, or a diet without antibiotics containing 12 g/d/, 15 g/d/, or 18 g/d/ of NaturSafe® for a period of 112 d. Following harvest, strip loins were collected, aged for 13 or 29 d and placed under retail display conditions for 0 or 7 d. Feeding NaturSafe® at 12 g/d or 15 g/d resulted in tenderness (shear force) values less than or equal to the control diets. Differences in color were observed between the NaturSafe® levels and the control diets. However, feeding NaturSafe® had minimal discernible effects overall, on meat quality.