Hi Aimee, thank you, I know right?!!! I found those sort of claims or info in various places on the web - one of them is: https://www.health-foundations.com/blog/2013/11/19/15-cool-facts-about-breastfeeding/ but there is no source for her info I'm afraid. There must be somewhere although really I wasn't being quite that scientific so didn't look for proof.