Hi there. If I may butt in...   but first I just want to say that I am not taking sides on this.

What I want to point out is that studies do not say A leads to B 100% of the time. All studies do is find the relationships between 2 or more things and then compare that to whatever is in question.  This is to say that if we hear a study that says breastfed babies have a higher IQ (hypothetically, let's say by 10 points) than those who have been formula fed - this doesn't mean that ALL babies breastfed will be have higher IQs. The study will just simply tell you the percentage.

A study published in 2007 found a VERY interesting relationship between breastfeeding and intelligence: it showed that whether breastfeeding affects a child's intelligence depends on a certain gene. In 90% of the children, the gene is such a way that breastfeeding DOES affect the child's intelligence, probably by affecting the fatty acid metabolism, or the way the body processes fatty acids. In the remaining 10%, breastfeeding versus bottle-feeding has no effect on intelligence.

This important finding now sheds some light on the previous studies that have had mixed results: there is another counfounding factor there, in the children's genetic material. But it further confirms the intellectual advantage breastfeeding can give for 90% of the children. (And of course even the 10% are helped by breast milk in other ways.)

Completely agree with you Fi.  Both my kids were/are bottle fed with formula. They are both smart, strong healthy kids. I would never get breast milk from a milk bank.