However, studies on RBV of Lys from l-Lys sulfateand l-Lys HCl in the postweaning phase are limitedfor nursery piglets. The aim of the present study wasto evaluate the RBV of l-Lys sulfate in comparisonwith l-Lys HCl and its effects on performance,blood parameters, intestinal functionality, and theapparent total tract digestibility in nursery piglets.