“…Previous studies have noted that ALA can enhance the antioxidants enzymes like superoxide dismutase, by reducing the substrate and free radicals to promote the lipid stability in birds (Kofuji, Nakamura, Nakamura, Isobe, Murata, & Kawashima, 2008;Li et al, 2019 (Liu, Lin, Mi, Li, et al, 2018;Liu, Lin, Mi, Zeng, et al, 2018). ALA has been reported to increase the reproductive hormones in ovarian oxidative damage rats (Nair et al, 2020). In the present study, 600 mg/kg ALA supplementation for aged breeder hens increased the level of E2 in the serum significantly.…”