Rachitogenic Activity of Soybean Protein

Isolated soy protein diets have been shown to produce rickets in turkey poults. Studies were conducted to determine if this is a peculiarity of isolated soy protein diets or if it is common to all forms of soybean protein. Wrolstad White turkey poults were fed five different forms of soybean protein: I) dehulled solvent extracted soybean meal; 2) full-fat or unextracted soybean meal; 3) RP-IOO; 4) C-I Assay proteins [two isolated soy protein products]; 5) Fibroprotein - a spun textured form of isolated soy protein