I had a conversation today with a pediatrician (very pro-BF, currently nursing her 3rd baby) about maternal wt. loss while lactating. She thinks she's heard or read that a lactating woman who is restricting calories (at around 1,000 cal./day) can get ketonic (but still feel well) and there can be toxic levels of ketones in her milk. I had never heard of this and told her I would post on Lactnet. Is there any information about this? I couldn't find anything in my library. TIA. Mary Cummins, M.Ed., IBCLC in cloudy Scottsdale (at least for today)