A Multi-Element Isotopic Tracer Assessment of True Fractional Absorption of Minerals from Formula with Additives of Calcium, Phosphorus, Zinc, Copper and Iron in Young Piglets 1 , 2

True fractional absorption of minerals was measured to determine the bioavailability of Zn, Fe, Mn and Se from liquid formulas fortified with stepwise additions of Ca and P (as Ca glycerophosphate and carbonate, Ca*P), and Zn, Cu and Fe (as sulfate salts). Growth, deposition of tracers in organs and bone mineral content of femurs as assessed by single photon absorptiometry were measured. Four-day-old piglets (n = 36) were randomly assigned to …