TY - JOUR
T1 - Effects of Lipoic Acid Supplementation on Finishing Steer Growth Performance, Carcass Merit, Beef Tenderness, and Beef Retail Display Properties
AU - Schmidt, T. B.
AU - Olson, K. C.
AU - Meyer, D. L.
AU - Brandt, M. M.
AU - Rentfrow, G. K.
AU - Stahl, C. A.
AU - Berg, E. P.
N1 - Publisher Copyright:
© 2005 American Registry of Professional Animal Scientists
PY - 2005/12/1
Y1 - 2005/12/1
N2 - Angus cross steers (n = 84; BW =325 ± 3 kg) were used to evaluate the effects of lipoic acid (LA) supplementation on growth performance, carcass merit, beef tenderness, and beef retail display properties. Treatments were control (no LA), 8 mg of LA/kg of BW per d (LA8), and 16 mg of LA/kg of BW per d (LA16). Lipoic acid was incorporated into an extruded corn flour pellet and top-dressed onto a finishing diet for 125 d. Steers were subsequently delivered to a commercial abattoir for harvest. Carcass data and left-side longissimus sections (6th to 12th rib) were collected from each carcass at 24 h post-mortem. Steaks from each longissimus section were analyzed for Warner-Bratzler shear force (WBSF) and color. Final BW of control steers was greater (P<0.01) than that of LA16 steers; final BW of LA8 steers was intermediate between the two. There were no treatment differences in ADG, DMI, or gain to feed ratio (G:F). Treatment had no effect on carcass weight, marbling score, longissimus area, kidney-pelvic-heart fat, or USDA yield grade. Subcutaneous fat thickness and the percentage of USDA Yield Grade 4 carcasses tended (P≤0.09) to be greater for LA16 steers than for control steers; LA8 carcasses were intermediate between control and LA16 steers in both categories. Mean WBSF values for steaks aged 21 d were less (P<0.01) for LA16 steers than for control and LA8 steers. Lipoic acid supplementation had negligible effects on subjective color scores of steaks aged from 7 to 21 d. Lipoic acid supplementation appeared to increase external fatness of beef carcasses.
AB - Angus cross steers (n = 84; BW =325 ± 3 kg) were used to evaluate the effects of lipoic acid (LA) supplementation on growth performance, carcass merit, beef tenderness, and beef retail display properties. Treatments were control (no LA), 8 mg of LA/kg of BW per d (LA8), and 16 mg of LA/kg of BW per d (LA16). Lipoic acid was incorporated into an extruded corn flour pellet and top-dressed onto a finishing diet for 125 d. Steers were subsequently delivered to a commercial abattoir for harvest. Carcass data and left-side longissimus sections (6th to 12th rib) were collected from each carcass at 24 h post-mortem. Steaks from each longissimus section were analyzed for Warner-Bratzler shear force (WBSF) and color. Final BW of control steers was greater (P<0.01) than that of LA16 steers; final BW of LA8 steers was intermediate between the two. There were no treatment differences in ADG, DMI, or gain to feed ratio (G:F). Treatment had no effect on carcass weight, marbling score, longissimus area, kidney-pelvic-heart fat, or USDA yield grade. Subcutaneous fat thickness and the percentage of USDA Yield Grade 4 carcasses tended (P≤0.09) to be greater for LA16 steers than for control steers; LA8 carcasses were intermediate between control and LA16 steers in both categories. Mean WBSF values for steaks aged 21 d were less (P<0.01) for LA16 steers than for control and LA8 steers. Lipoic acid supplementation had negligible effects on subjective color scores of steaks aged from 7 to 21 d. Lipoic acid supplementation appeared to increase external fatness of beef carcasses.
KW - Beef
KW - Feed Additive
KW - Tenderness
KW - Yield Grade
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U2 - 10.15232/S1080-7446(15)31253-5
DO - 10.15232/S1080-7446(15)31253-5
M3 - Article
AN - SCOPUS:85008156627
SN - 1080-7446
VL - 21
SP - 480
EP - 485
JO - Professional Animal Scientist
JF - Professional Animal Scientist
IS - 6
ER -