This may be due to the source of the organic Zn, which may provide additional S that the heart selectively stored. As expected, because if the known Zn and Fe interaction (Hill et al., 1983d), as Zn increased in the diet regardless of source,
Fe in the heart tissue decreased in a linear manner with organic (P ≤ 0.05) and inorganic Zn (P ≤ 01).