I have to do analysis about correlation between diseases and nutrition consumption. Where I can find data sets about food (nutrition) consumption, divided by diseases (I can also use two data sets: nutrition ~ country and country ~ diseases?
Another possibility is gapminder, which has a subcategory "nutrition" with three data sets (as of this writing). The datasets about disease are much more targeted -- specific subcategories for tuberculosis, cancer, and others -- but there is that kind of data.
The UN FAO also has an enormous amount of data, although I'm not sure that it counts things at the level of individual health.