Figure 1.
Frequency distribution of toxic (Pb and Cd) and essential elements (Ca and Zn) in cow’s milk consumed by children in Brasília; values below the detection limit are represented as zero.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.