Kathy and all-- My bipolar daughter (16) was bf for over 4 years (and is in your study, Kathy!)--so I'd hope that she rec'd all the benefits of breast milk and then some. I console myself that it would be worse if she'd not been an extended breastfeeder--the longest of our 8 children--guess she knew what she needed, even back then. Karen Zeretzke Baton Rouge, Louisiana