The Substances Menu
contains:

• Glycemic Index and GI calculator.
• List of Substances whose levels in a wide range of foods have been determined.
• Oxalate and Purine levels with calculator.
• A list of common Phytochemicals.

Examine the options -
by clicking on:

Glycaemic Index
Other Substances

NB:
Other categories are not included in the tutorial, as they are self-explanatory.