Originally Posted by taubele
Mostly, I know that Vitamins A and D are fat-soluble (not to mention E and K), and therefore whatever is in the fat-free milk (whether "fortified" or not) can't be absorbed without the milk fat (though, to be fair, I do wonder if I could absorb them if something else I ate in the meal contained fat. I'm not a nutritionist
Maybe you just need to eat enough fat elsewhere and it doesn't matter if it's not right in the milk?). Liquid foods necessarily make absorption easier, of course.
You are right. The fat can come from anywhere in your diet, it doesn't have to be in the milk to help with the vitamin absorption. Once everything is mixed in your stomach (or your intestines), it doesn't matter where the fat has come from. It just needs to be there to help the fat-soluble stuff get across the border of your intestines which is water-based. Bile from your gall bladder also helps with this, but you don't have to do anything to make that happen (assuming you have a gall bladder!).