Resveratrol improves meat quality and promotes intramuscular fat deposition of finishing steers through activation of the PPAR signaling pathway

The results showed that RES significantly increased the final body weight and average daily gain of steers (P < 0.05). Moreover, it significantly increased the live weight before slaughter and carcass weight while reducing subcutaneous backfat thickness (P < 0.05). Additionally, RES significantly increased the IMF content in the Longissimus thoracis et lumborum (LTL) muscle and reduced drip loss, cooking loss and shear force (P < 0.05). Notably, 400 mg/kg RES supplementation significantly decreased adipose triglyceride lipase and hormone-sensitive lipase activities of LTL muscle and acetyl-CoA carboxylase activity was enhanced in all RES-treated groups (P < 0.05).