Lara, I'll copy and paste your reply and comment on bits of it, as it makes it easier for us both to keep track
" However, in practice, there are lots of things we accept without a systematic review. I mean there should be quite a lot randomised control studies done for cochrane to reccomend something. And these evidence should be based on clinical studies. However, in practice we sometimes trust preclinical studies (which are done in labratories)or even expert opinions which have not been proven by research yet."
True - and of course early studies do tend to be lab based, and then they're taken out into the 'real' world, where hypotheses are tested on (in this case) 'real' babies. Surely, when it comes to a recommendation of what infants are going to eat as their sole source of nutrition in the first months, we need trials that show effects on real babies...lab results won't cut it.
"They reviewed 14 well established studies and in 3 of them (3 well established studies) there were significant differences (in one VEP and in 2 mental development). This is of course not enough for cochrane to make a recomendation. However, as a mother I would think "why these 3 studies showed differences?".
Make up your mind, Lara. You are either a clinician with an interest in research, and rightly cautious and even scepetical about untested claims, or a mother who's cherry-picking studies that show what you want them to show.
As a researcher, you know that sometimes, studies show something anomalous. That's why Cochrane exists! That's why other researchers try to replicate results. Until the results of these 3 studies are replicated, no one can draw any conclusions from them.
"There are also quite good well conducted laboratory studies showing relationship between neurodevelopment and LCPs."
Of course there are. And this is why it's the LCPs in breastmilk are thought to be the 'goodies' when it comes to neurodevelopment. Breastmilk's LCPs are 'packaged' in a safe environment, with other 'ingredients' that enhance their function. It may or may not be the case that the LCPs added to cows milk (artificially harvested LCPs, by the way, from marine algae and from fish, which may or may not make a difference!), are in a safe environment, alongside other ingredients that enhance their function. You could add an ingredient and find it actually works against digestion, or growth, or health in some other unspecified way. Only 'in vivo' research is going to really show you that.
"In the review re exclusive breastfeeding, they don't say "less morbidity from gastrointestinal illness", they say "...gastrointestinal infection". These are quite different things. If you don't give an infant nothing but breastmilk of course he will not suffer from any infection. If you give them only sterilized water for example the result would be the same in terms of GI infection (he would suffer from malnutrition but won't have any GI infection)."
You're not making sense, Lara, sorry. It would be perfectly possible for a baby to have a GI infection on sterilised water only - the very fact he was malnourished would lower his immune system and make him more prone to airborne pathogens, or anything he 'picked up' from someone touching him. He could even pick something up from the vessel delivering the sterilised water.
This is the case with breastfed babies, too. They do not live in a germ-free bubble, but their exposure to bugs of all sorts is mediated through an immune system that's boosted, protected and developed by breastfeeding.
:However, although it cannot be confirmed by cochrane reviews in practice we know that it is beneficial.":
How do you know that it is beneficial in practice? Where are the studies?
"I am sorry but the study I shared with you is not an unimpressive/unreliable study. It was published in a very well known and respected journal (British Journal of Nutrition). It is a quite invasive study for healthy babies as they did blood tests twice. Do you know how difficult to persuade parents for 2 blood tests twice in 2 months for their healthy babies. It is actually quite a good study which is trying to investigate only one component of the big picture."
It is very difficult to do tests on babies like this, I agree. I am not saying the journal is not respected. But perforce the study can only look at one component of the big picture, as you say - are you saying that because good, long term research is hard to do with a big cohort of healthy babies, we should just accept the lab studies and recommend LCPs in formula on that basis?
"At the end this is my opinion, and giving our current knowledge re the issue, my opinion is as logical as yours."
Goodness me, I hope not....my opinion is far more logical
The link you asked for is this:
Aus and NZ regs