I can not remember who posted about this. In Lawrence's book it says: "Higher uptake in the infant than mother. Strongly bound to hemoglobin so not much gets into milk. Formula may have higher concentration. M/P ratio 0.02-1 Maximum amount in milk (mg/l) .072 page 734 In Chemical Agents and Breastmilk, page 471, it says: "Effect on infant: significant Data: Although usually lead concentrations in human milk do not constitute a significant health hazard to the infant, the lead intoxicated mother should have specific testing done before nursing is continued, as damage to the infant's central nervous system is a risk of lead exposure." Dany Gauthier IBCLC [log in to unmask] Montreal, Canada Tel: 514-923-3792 Fax:514-923-3802