Paul, Though I agree that iron sequestration by lactoferrin is only one component of the immunological picture of human milk, but I think it is an important one. Studies of infant botulism show the worst outcomes (sudden death) for exclusively artificially fed infants; the best outcomes for exclusively breastfed kids, and intermediate morbidity for breastfed infants supplemented with iron. We need to avoid the all-too-human capacity for extremism, so that we treat the anemic mother, while preserving the perfect balance of breastmilk for the well baby. Catherine Watson Genna, IBCLC [log in to unmask]