Concentrations in food is used by the human intake model. Food are separated into the following categories:

  * Fish - Bass, Perch, Salmon etc. Given by the Fish model
  * Fruits - Apple, Peach etc. grown locally. Given by the Fruit tree model
  * Grain - Wheat, Rye etc. Given by the Grain model
  * Leafy vegetables - Given by the Leaf model
  * Tubers - Potato, etc. Given by the Tubers model
  * Roots - Carrots etc. Given by the Root model.
  * **External food** - any type of food which is not modelled by the software.