Bella's Mom, you're very kind. I did not know quite how adversarial your comment was (not at all, as it turns out!) and on some posts on this forum (not this thread), there is a lot of misunderstanding of different cultures. Some of it goes thinly veiled under the theme of "help me to understand you" when really all it is is a chance to ridicule someone for their different choices. I see that was not your intention at all.
Regardless of that, I do feel that it doesn't hurt for me to have explained the situation. Perhaps there is someone else out there who is struggling with their gymnast's dietary requirements. Maybe me stating that we sought the advice of a sports nutritionist will encourage them to do the same. We found it to be extremely useful, and things have improved greatly energy-wise-at-the-end-of-a-training-session, since we've been following her advice.
Thanks for your kindness.