Albumin, a plasma protein, has a great capacity to bind several metals, yet, for some metals, binding occurs with proteins having a specific transport function such as transferring or ceruloplasmin. These bindings constitute a major protective mechanism against metal toxicity. Thus, the availability of toxic elements is regulated to a large extent by the availability and relative concentrations of these biological ligands as well as by the ability of the resulting metal complexes to serve as substrates for the various organic solute transporters (Powell et al., 1999; Bressler et al., 2004). Absorption and distribution mechanisms of chemical elements in an animal organism are presented in