I talked to a person selling this product at a baby expo who said that it was not for nursing mothers because it would make the milk "sour" I tried it for a while myself and my nursing 4 year old never said that my milk was sour-so who knows. It didn't effect my milk supply at all, but it was pretty well established. FYI, this was in the US, but I know that they have it here in Austrailia too. I look forward to seeing what gets posted here too. nancy Sherwood IBCLC Perth, Australia