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Before starting with the cases you will be shortly introduced to food composition databases and data quality.

This will make the objectives of the cases more clear to you.

Here you see a comparison of food composition data from six different countries.

These differences could

1) be real differences. Thus the analyzed foods really differ with respect to their carbohydrate contents.

OR

2) These differences could be caused by differences in analysis methods, definition of carbohydrates, incomparable food products etc.

THEREFORE.....

To interpret food composition data it is important to have knowledge on the origin of the data. (E.g. Sampling method, analysis method etc).