Figure 7

Fecal and urinary excretion of⁶⁵Zn post-gavage of⁶⁵ZnO and SiO ₂ -coated⁶⁵ZnO NPs. Data are estimated cumulative urinary or fecal excretion of ⁶⁵Zn over 7 days. Similar to the IT-instilled groups, the predominant excretion pathway was via the feces. Ninety five % of the instilled ⁶⁵Zn was excreted in both groups by day 7 (A). Only 0.1% of the ⁶⁵Zn dose was excreted in the urine (B).