Hi Tea
I have just seen this thread, and have a comment....
My brother has been lactose intolerant most of his life, and as John said, as soon as he had some dairy, was very soon on the loo. I have recently started milking two jerseys, and Geoff had a huge drink of milk one morning, and at 1pm realised that he hadn't had a sniff of his old problems. Yes, it's an anecdotal case, but perhaps there is something to the raw milk issue and intolerance. So much damage is done to the milk by pasteurisation, that it's on the cards that it does this too. I have a fair bit of information on raw milk, so I'll check it out and report back.