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SOD and GST activity are significant increased in response to treatment in aged dogs. Dogs provided with the combination of an antioxidant-fortified diet and behavioral enrichment show significantly increased GST and total SOD enzyme activity relative to controls. Activities of GST and SOD are expressed as units per milligram of protein and data are presented as % control ± SEM for animals in each treatment group, (n=5) * p <0.05.
