This should ba a collection of all raw data for wrangling and processing.
Food Supply data by the FAO (http://faostat.fao.org/site/345/default.aspx) - Ranges from 1989-2009, shows available food per person in g and kcal.
WHO has all sorts of data at http://apps.who.int/gho/data, such as BMI and physical inactivity.