Theses and Dissertations

Issuing Body

Mississippi State University


Liao, Shengfa

Committee Member

Dinh, Thu

Committee Member

Devost-Burnett, Derris

Committee Member

Feugang, Jean M.N.

Date of Degree


Original embargo terms

Visible to MSU only for 2 years

Document Type

Graduate Thesis - Campus Access Only


Animal Science

Degree Name

Master of Science


College of Agriculture and Life Sciences


Department of Animal and Dairy Sciences


L-Methionine (L-Met) is a new product that supplies the biologically active form of methionine. Therefore, the objective of this study was to elucidate the benefits of dietary L-Met supplementation relative to the industry standard DL-Met. Sixteen gilts with an initial BW 81.2±7.93 kg were individually penned and randomly allotted to one of two equivalent dietary treatments for 37 days in 2 trials (8 pigs/trial): DL-Met (0.050% of diet) or L-Met (0.052% of diet). Body weight and feed intake were measured on days 0, 19, and 37 to calculate performance measures. Pigs were harvested and carcasses assessed on day 38. Liver, loin muscle, and subcutaneous fat were collected for antioxidant assessments. Data were analyzed via Proc Mixed in SAS and significance was set at P ≤ 0.05. There were no differences between dietary treatments in growth performance, carcass characteristics, or antioxidant status (P > 0.05). In conclusion, methionine form did not differentially impact animal growth or antioxidant status.



MSU-ADS Graduate Research assistantship program USDA-NIFA Hatch/Multistate Project (No. 1007691) MAFES Strategic Research Initiative grant (2019)


antioxidant||methionine||swine||amino acid