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ISSN : 1225-2964(Print)
ISSN : 2287-3317(Online)
Annals of Animal Resource Sciences Vol.34 No.4 pp.128-136

Effects of γ-aminobutyric Acids Supplementation on Growth Performance, Blood Profile and Carcass Characteristics of Fattening Hanwoo Steers

Gi-Hwal Son1#, Byung-Ki Park2#, Jun-Sang Ahn3, Xiang-Zi Li4, Jong-Suh Shin2*
1Researcher, Institute of Animal Life Science, Chuncheon 24341, Korea
2Professor, College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea
3Team leader, Nonghyup Feed Co., LTD, Seoul 05398, Korea
4Professor, Department of Animal Science, College of Agriculture, Yanji 133002, China
#These authors contributed equally to this work.
*Corresponding author: Jong-Suh Shin, College of Animal Life Sciences, Kangwon National University, Chuncheon 24341, Korea. Tel: +82-33-250-8628, E-mail:


γ-aminobutyric acid (GABA) is a natural stress-reducing substance and is actively used as a human health supplement. However, minimal research has been conducted on its use in cattle. This study was conducted to evaluate the effects of GABA on the growth performance, complete blood count, blood metabolites, and carcass characteristics of fattening Hanwoo steers. Twenty-one fattening steers were randomly assigned to one of three treatments: control (basal diet: concentrate feed + rice straw), T1 (basal diet + GABA supplement at 0.8% of feed/head/day), and T2 (basal diet + GABA supplement at 1.6% of feed/head/day). Feed intake and conversion ratio did not differ among the treatments. However, the average daily gain during the early fattening period increased linearly to 0.80 kg, 0.86 kg, and 0.92 kg in the control, T1, and T2 groups (p<0.05). Plasma γ-glutamyl transferase (37.5, 58.2, 42.8 U/ℓ) and creatinine (1.32, 1.34, 1.49 ㎎/㎗) levels in the GABA supplement group were increased compared to those in the control group. The carcass weight (422.7, 427.1, 454.1 kg), rib eye area (86.67, 92.57, 91.14 cm2), and marbling score (3.67, 4.29, 4.14) were numerically higher in the GABA supplement group than in the control group. Thus, GABA supplementation positively affected the average daily gain and carcass characteristics of Hanwoo steers. However, the effect of the GABA supplement level of GABA was small, and further research using rumen-protected coating technology on GABA is necessary.

γ-aminobutyric acid 의 첨가가 비육기 거세한우의 성장특성, 혈액성상 및 도체특성에 미치는 영향

손기활1#, 박병기2#, 안준상3, 이향자4, 신종서2*
강원대학교 동물생명과학연구소 연구원1
강원대학교 동물생명과학대학 교수2
농협사료 팀장3
연변대학교 농학대학 교수4