It's very well controlled. He has an insulin pump that is permanently attached to his side. On a normal night he just has 0 to 1 beer, but on a rare occasion that he's as some sort of party I've seen him have up to three in the entire evening. He's just very cautious and likes to know everything that he puts into his body, which I applaud him for.
Now, he has an Apple computer, so if bought beertools pro, for instance, this would help him get the figures he needs?