As others have stated you can manually add a vitamin as a "food" to your nutrition tracker.
Here are several links to foods high in potassium:
2010 Dietary Guidelines: Apendix 12 (pg. 87) www.cnpp.usda.gov/Publications/DietaryGuid
2005 Dietary Guidelines:
Edited by: SPOORK at: 5/23/2012 (09:17)