A meta‐analysis to study the effects and relationships of various selenium sources and forms on production performance, antioxidant status and egg quality of laying hens

Various forms of Se could be safely supplemented to diets at high doses of up to 5 mg kg^-1 without adversely affecting hens' performance while enhancing antioxidant status. Supplementation with SM could be the most effective strategy to improve egg Se status among other forms of Se which may be beneficial for consumers. © 2025 Society of Chemical Industry.