What are all the nutritional differences between organic and non-organic milk? What about non-organic milk that is hormone free, what other chemicals could be in non-organic hormone free milk? What nutrients are lost during pasturization? What else can you tell me about milk???
PS - I know milk is not paleo, it is for my 10 month old son, not me. While I am not ready to introduce him to cow's milk just yet, I am only trying to do my research.
All I know about milk: DO NOT DRINK PASTEURIZED MILK. DO NOT. If you absolutely have to have it, drink RAW.
How do I know?
My body is extremely sensitive. I mean, I can probably be a police dog. No, I will probably be better than a police dog - I can talk.
Anyway, I bought some ORGANIC GRASS-FED PASTEURIZED MILK boy oh boy... all that progress that I have made recently eating raw vegetables went out the window. I got so sick, I thought it was the end of it. I even lost hope for a while.
I do not know what nutrients are lost during pasteurization, but let me tell you: it is not worth it. Whatever nutrients are left - you will get them from some other source, no doubt. It almost killed me.
So, to reiterate - if you absolutely must have it - DRINK RAW!!!!!!!!!
Many organic milks marketed in big retail outlets are "ultra pasteurized." My understanding is this is the least desirable. If you can find organic milk at stores that focus on more local products that aren't mass-marketed, you may find ones that are only pasteurized, rather than ultra-pasteurized. It probably depends on where you live whether or not you'll have access to this. Sadly, raw-milk, perhaps the best option, seems out of reach for most of us, but as others have said, if you can get it, it's perhaps worth seeking out.
I jumped the hoops to buy into a cow share and get raw grass fed milk in my state. Well worth the hassle IMO. I have fed my kids the organic grass fed variety from the store, but only after home fermenting it into yogurt.
Grass fed is actually going to give you a more noticeable change in nutritional profile than any other "labeling". Problem is that I don't trust labels. Thats why I go to the farm now.
You might want to look into nutritional data on grassfed dairy, as opposed to just organic. Organic simply means that the cows are not given any feed that has been treated with pesticides but does not mean they are given what they are evolved to eat...grass instead of grains. I wish I could answer the nutrition part of the question, but I haven't found any concrete information...I do know that grassfed dairy tastes infinitely better to me than either conventional or organic.