NHANES Food Frequency Questionnaire.
If you listen to the previous presentations, then check out what this NHANES survey actually looks like:
Obsessed with identifying low fat foods, ignores soyabean all together. Most categories are a mix of proteins and starches - it's a complete muddle.
Whoever wrote it is obsessed with both low-fat products, fruits, and has little concept of actual foods. For example, what exactly is "low fat butter"? Why is soy milk and dairy lumped together? This is not a food group! Chicken nuggets and chicken are not a category either.
It is American based, a country with a huge fast-food culture and a vast array of ethnic foods. One wouldn't think so.
There is no likelihood whatsoever that using this kind of dataset will yield anything useful as regards what to eat! Try to complete it yourself.