How offended does your T1D get when asked this? It really is a hot button for my son. In my opinion he shouldn't have to defend or explain what he eats. Frankly it's no one's business. And it really sends him over the edge if it's asked by a family member. We've educated my in-laws over and over and yet just recently my step-father in-law asked him at a birthday party if he was allowed to eat cake (as it was being served). DS was pissed and said something rude to FIL. Honestly I can't blame him.