“Effects of Different Levels of Soybean Bioactive Peptides and Vitamin E on Performance, Egg Quality, and Serum Metabolites of Laying Hens”. The International Journal for Scientific Research 2, no. 12 (December 15, 2023). Accessed August 30, 2026. https://www.vsrp.co.uk/index.php/ijsr/article/view/1264.