The addition of EDTA to purified diets containing no supplementary Zn improves the availability of the Zn already present in the ingredients. EDTA also improves the utilization of supplementary Zn (Kratzer and Starcher, 1963). This is attributed to the chelating properties of EDTA which increase the absorption of Zn through the intestinal tract (Kratzer et al., 1959; Suso and Edwards, 1968). However, 65 Zn and EDTA–14 C are not absorbed at the same rate in chickens from a 65 Zn-EDTA-14 C complex (Koike et al., 1964; Darwish and Kratzer, 1965). In contrast to 65 Zn, the intestinal absorption of 54 Mn was not increased significantly by EDTA in chickens (Suso and Edwards, 1968). As Zn and Mn are always present together in the feeds, the effect of EDTA on the simultaneous absorption of 65 Zn and 54 Mn has been investigated in turkey poults raised to an age of about 28 days on 4 purified diets containing…