Cadmium: The typical daily dietary intake of cadmium is 10 to 20
µg. Significant sources of cadmium include shellfish, grains (especially
those grown on high cadmium soils) and leafy vegetables. Cadmium has a
long half-life in the body and thus high intakes can lead to accumulation
resulting in damage in some organs, especially the kidney. The Reference
Dose (RfD) (safe daily intake over a lifetime) for cadmium is 0.5 µg per
kg body weight.