Thought I'd already posted here - oh well!
Just wanted to say that I used to eat lots of raw liver, and I found that, after a while, my body just quickly excreted the liver out the other end in almost liquid form, virtually unabsorbed, (liver is the only raw animal food, other than raw dairy, which gives me liquid stools). Never had a problem with vitamin A overdose, even though, at one time, I ate vast amounts of raw liver, early on in the diet. It's still important to eat some liver, here and there(every week or two?) but more than that's probably unnecessary.