I researched this when I worked for Ohio Dept of Health. I found no reference
that supported a relationship between mother's serum level of lead and the
level in her milk. Most minerals are stable in milk regardless of maternal
serum level. Chet Berlin at the Hershey Medical Center, or Dr. Ruth
Lawrence's Study Center, or Tom Hale might be able to clarify this more.
Linda Smith, BSE, FACCE, IBCLC
private practice, Dayton OH