*4.4. Bioavailability Factor*

The daily dose of ZEN (20 or 40 μg/kg BW) was administered to each animal individually, which corresponds to exposure to 928.74–1856.8 μg ZEN/kg of a complete diet, depending on daily feed intake (Table 1).

The bioavailability factor (see Figure 5) was calculated as the ratio of ZEN + α-ZEL = ZOL bioavailability in peripheral blood (expressed as ppb) to ZEN concentration in the diet (expressed as ppb), expressed as the overall dose administered in each week of the experiment, according to a previously described method.
