Kerry, I do not have a research-based answer but a possible theory. As the fat is reduced in the milk, it should pass through the digestive system faster causing the looser stools that are often seen in mom's with oversupply or foremilk/hind milk imbalance. If the whole COW milk caused constipation, it might be offset by the fast movement through the digestive tract causing the stools to loosen. Another thought is that if the milk passes through the digestive tract faster, perhaps not as many of the proteins are digested, they end up in the toilet instead. Linda Pohl, IBCLC Phoenix AZ Has anyone heard of this? I've heard a couple people mention they "know of" people who insist their children are "allergic" to milk *fat*, and that their child needs to have skim milk, if they're given whole milk, they become constipated. As soon as the child is switched to skim, the problems resolve. Of course, this is also given as the reason why the mom couldn't breastfeed {rolls eyes}. I'm wondering if skimming the milk also removes some or most of the milk protein? I don't have any milk in our fridge to compare labels and see if skim milk has less protein than whole milk. Anyone know, or have heard of this? *********************************************** 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