well i was told its because when you are on the shakes etc your body goes into a state of ketosis (or something like that) which means it produces something that is not good for baby.

having said that, i was also told that i can get a letter from my GP and then they will accept me. (my baby is 12 months though). also i plan on just doing one meal replacement a day not the whole regime that they do.

also, i used to do betty baxter (similar to tony but at a different chemsit) while i was breastfeeding and they had a plan especially for breastfeeders.