Parenteral PDEs (apart from that of Pt) are obtained by multiplying the oral PDE by the estimated oral bioavailability of the particular element ranging from 5 to 50%.New Zealand Limits: New Zealand Limits Element New Zealand Food Standard (mg/kg) Cadmium, in any food other than shellfish 1.0 Copper, all beverages 2.0 Lead, all beverages 0.2References: References http://www.phytolab.com/contaminan