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Journal of Animal Science, Vol 72, Issue 8 1927-1935, Copyright © 1994 by American Society of Animal Science

JOURNAL ARTICLE

Effects of beta-hydroxy-beta-methyl butyrate on performance and carcass quality of feedlot steers

M. T. Van Koevering, H. G. Dolezal, D. R. Gill, F. N. Owens, C. A. Strasia, D. S. Buchanan, R. Lake and S. Nissen
Department of Animal Science, Oklahoma State University, Stillwater 74078-0425.

Beta-hydroxy-beta-methyl butyrate (HMB), a compound formed during catabolism of leucine, was fed to 256 crossbred steers as 0 or .03% of diet dry matter. Effects on performance, carcass characteristics, and tissue composition were measured. Groups of 32 steers per diet were slaughtered after 105, 119, 133, and 147 d on feed. The HMB was fed to each group only during the final 82 d they were fed. Averaged across slaughter date, animal performance was not altered by HMB; however, an interaction between HMB and time on feed was detected. Feeding HMB increased (P < .01) daily gain of steers slaughtered at 105 d but decreased (P < .01) daily gain of steers slaughtered at 147 d. Steers fed HMB had numerically higher marbling scores that resulted in a trend toward higher carcass quality grades. Steers receiving HMB tended to have less (P < .08) s.c. fat and fewer steers with yield grades of 4 or greater (1.6 vs 4.7%). Supplementation of HMB to feedlot steers tended to increase (P < .07) the ratio of intramuscular fat to subcutaneous fat. Steers fed HMB had higher (P < .001) blood plasma concentrations of HMB (3.06 vs 1.70 mg/L) and lower (P < .03) blood plasma concentrations of cholesterol (108.4 vs 118.7 mg/dL). Feeding HMB tended to increase (P < .10) lipid content of the longissimus muscles of those steers slaughtered at 105 d.


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M. J. McPhee, J. W. Oltjen, T. R. Famula, and R. D. Sainz
Meta-analysis of factors affecting carcass characteristics of feedlot steers
J Anim Sci, November 1, 2006; 84(11): 3143 - 3154.
[Abstract] [Full Text] [PDF]

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S. Nissen, R. L. Sharp, L. Panton, M. Vukovich, S. Trappe, and J. C. Fuller Jr.
{beta}-Hydroxy-{beta}-Methylbutyrate (HMB) Supplementation in Humans Is Safe and May Decrease Cardiovascular Risk Factors
J. Nutr., August 1, 2000; 130(8): 1937 - 1945.
[Abstract] [Full Text]


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