The DOI matches its Crossref record.
Use of a β-Agonist to Alter Fat and Muscle Deposition in Steers1
Abstract
The effect of a β-agonist, clenbuterol [benzyl alcohol, 4-amino-α-(t-butylamino)methyl-3, 5-dichloro] on carcass composition, performance criteria and clinical blood chemistry was evaluated in 24 finishing Hereford steers assigned to three treatment groups. Clenbuterol was administered in the feed at 0, 10 or 500 mg•head−1•d−1 for 98 d. Carcass evaluation showed that the 10 and 500 mg•head−1•d−1 treatment groups had 11 (P≤.05) and 16% (P≤.01) larger 12th rib longissimus muscle areas, 35 (P≤.01) and 42% (P≤.01) less 12th rib fat depths, 23 (P≤.05) and 33% (P≤.01) less kidney, pelvic and heart fat and improved USDA yield grades of 1.0 and 1.5 grade points, respectively. Chemical analysis of the 9th to 11th rib section from these carcasses indicated that they had 13 (P≤.01) and 14% (P≤.01) higher protein contents, 20 (P≤.01) and 30% (P≤.01) less fat and 10 (P≤.05) and 16% (P≤.01) more water, respectively. Clinical chemistry measurements were within normal physiological ranges. Blood urea N levels (mg/dl) for the 0, 10 and 500 mg clen-buterol•head−1•d−1 were 9.6, 8.5 and 5.9 (P≤.01), respectively, indicating that clenbuterol may have increased N retention. Rate of gain was not altered at 10 mg•head−1•d−1, but was reduced (P≤.05) by the high drug level. There were no differences among treatments in feed efficiency. The data demonstrate that significant improvements in muscle accretion with concomitant reductions in fat deposition can be achieved by feeding clenbuterol to finishing steers.
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“However, some repartitioning treatments such as β-adrenergic agonists act on skeletal muscle and adipose tissue at the same time.”
From Effects of Skeletal Muscle Hypertrophy on Fat Mass and Glucose Homeostasis in Humans and Animals: A Narrative Review with Systematic Literature Search (2025) · cites this paper as [170]
In the citing paper
“A key example is β-adrenergic agonists, which stimulate skeletal muscle hypertrophy and adipose lipolysis by acting on adrenergic receptors expressed by both tissues [170, 183].”
From Effects of Skeletal Muscle Hypertrophy on Fat Mass and Glucose Homeostasis in Humans and Animals: A Narrative Review with Systematic Literature Search (2025) · cites this paper as [170]
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Metadata
- Authors
- Ricks, C. A., Dalrymple, R. H., Baker, P. K., & Ingle, D. L.
- Affiliations
- Apnimed (United States) (US)
- Venue
- Journal of Animal Science
- Publisher
- Oxford University Press (OUP)
- Published
- 1984-11-01
- Volume
- 59
- Issue
- 5
- Pages
- 1247-1255
- ISSN
- 0021-8812 (ISSN-L)
- 1525-3163
- OpenAlex
- W2547271346
- Cited by
- 294
- References
- 0
- Citations by year
- 2026: 4 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 5 · 2020: 2 · 2019: 1 · 2018: 8 · 2017: 9 · 2016: 5 · 2015: 5 · 2014: 4 · 2013: 9 · 2012: 4
- FWCI
- 18.79
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Animal Science (publishedVersion)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Pharmacological Effects and Assays
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Meat and Animal Product Quality
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Ruminant Nutrition and Digestive Physiology
- Keywords
- clenbuterol, beta-adrenergic agonists, Hereford steers, carcass composition, fat deposition, muscle deposition, loin eye area, USDA yield grade, blood urea nitrogen, nitrogen retention, weight gain, feed efficiency, finishing cattle
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