The Registry accepts non-US members, if anyone's wondering.
I find some of the questions hard to answer though. The questionnaire assumes that you eat a lot of processed/packaged food. For example, do you eat "regular" or low-fat salad dressing? We don't buy bottled salad dressing, so whether we eat regular or low-fat depends on the recipe we're using that night.

Then there's a question about whether you eat cold cereal. (Yes) Then later on, you're asked to fill in a box from a list - Special K, Kashi Light etc. I eat either home-made muesli (no added sugar) or home-made granola (no added sugar or fat) so I just leave that box blank, thus creating a discrepancy. Once, the Registry emailed me because I forgot to answer a question, but they never got back to me about the cereal issue.
Anyway, it's a worthwhile exercise.

