While the Nano-particles are absorbed, they should act in the way the ordinary products do. However, the absorption process should not be identical with that of the ordinary forms as their different physico-chemical characteristics in the GI fluids may interact with the gastric and intestinal emptying times. This may in turn affect the time needed for them to reach the peak concentration in the blood as well as the highest concentrations achieved. The aim of the present study was to discover the blood concentrations of iron after oral administration of nano particles of iron oxide. Rabbit was...