Introduction: In vertebrates fibroblast growth factor 23 (FGF23) is a phosphate regulating hormone closely linked to calcium regulation by vitamin D and parathyroid hormone (PTH). Although phosphorus. calcium and vitamin D are important for poultry well-being. relatively little is known about their levels of FGF23. https://lecoureures.shop/product-category/plein-air-accessoires-lampe-frontale/