Effects of different levels of organic chromium and selenomethionine cocktails in broilers

Jaewoo An1, Younggwang Kim1, Minho Song2, Jungseok Choi1, Hanjin Oh1, Seyeon Chang1, Dongcheol Song1, Hyunah Cho1, Sehyun Park1, Kyeongho Jeon1, Yunhwan Park1, Gyutae Park1, Sehyuk Oh1, Yuna Kim1, Nayoung Choi1, Jongchun Kim3, Hyeunbum Kim4,*, Jinho Cho1,**
Author Information & Copyright
1Chungbuk National University, Cheongju 28644, Korea.
2Chungnam National University, Daejeon 34134, Korea.
3Soma, Eumseong 27698, Korea.
4Dankook University, Cheonan 31116, Korea.
*Corresponding Author: Hyeunbum Kim, Dankook University, Cheonan 31116, Korea, Republic of. E-mail:
**Corresponding Author: Jinho Cho, Chungbuk National University, Cheongju 28644, Korea, Republic of. E-mail:

© Copyright 2023 Korean Society of Animal Science and Technology. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Selenium (Se) is an essential trace mineral that plays an important role in physiological processes by regulating the antioxidant defense system and enhancing immunity. Chromium is an essential mineral involved in carbohydrate and lipid metabolism and also plays a role in maintaining normal insulin function. Based on these advantages, we hypothesized that the addition of selenomethionine (SeMet) and organic chromium (OC) to broiler diets would increase selenium deposition, antioxidant capacity and immune response in meat. Therefore, this study analyzed the effects of OC and SeMet on growh performance, nutrients digestibility, blood profiles, intestinal morphology, meat quality characteristics, and taxonomic analysis of broilers. A total of 168 one-day-old broiler chicken (Arbor Acres) were randomly allotted to 3 groups based on the initial body weight of 37.33 ± 0.24g with 7 replicate per 8 birds (mixed sex). The experiments period was 28 days. Dietary treatments were folloewd: Basal diets based on corn-soybean meal (CON), basal diet supplemented with 0.2 ppm OC and 0.2 ppm SeMet (CS4), and basal diet supplemented with 0.4 ppm OC and 0.4 ppm SeMet (CS8). Supplementation of OC and SeMet did not affect on growth performance, nutrient digestibility. However, CS8 supplementation increased in duodenum villus height and villus height : crypt depth, and increased in breast meat Se deposition. In addition, CS8 group showed higher uric acid and total antioxidant status than CON group. Taxonomic analysis at phylum level revealed that <italic>Proteobacteria</italic> and <italic>Firmicutes</italic> of CS4 and CS8 were lower than CON group. In genus level, the relative abundance of fecal <italic>Lactobacillus</italic> and <italic>Enterococcus</italic> of CS4 and CS8 groups were higher than CON group. In short,  0.4 ppm OC and 0.4 ppm SeMet supplementation to broiler diet supporitng positive gut microbime change, also enhancing antioxidant capacity, and Se deposition in breast meat.

Keywords: Selenomethionine; organic chromium; broiler; selenium deposition