Judy you wrote, "While I don't have data on formula contaminants, I fully agree with Sandra Steingraber that contaminant levels in cows milk and formulas are going to be much lower than what is found in human milk." Does this statement mean that there is data on formula contaminants (PCBs for example) that is published? Are there studies that compare infants exclusively formula fed versus infants exclusively breastfed in regard to organochlorine compounds? Maureen Minchin in her book, "Breastfeeding Matters," states that a survey in the US in 1985 revealed that 78% of 1200 milk samples (cow's milk samples) were contaminated with organchlorine compounds. What is your basis for belief without data that formula and cow's milk are less contaminated than human milk? Valerie W. McClain, IBCLC *********************************************** The LACTNET mailing list is powered by L-Soft's renowned LISTSERV(R) list management software together with L-Soft's LSMTP(TM) mailer for lightning fast mail delivery. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html