Which foods have the highest potassium content and should be avoided in those suseptible to hyperkalemia?

Highest content (> 25 mEq/100 g)

• dried figs
  
• molasses
• seaweed
  

Very high content (>12.5 mEq/100 g)

• dried fruits (dates, prunes)
• nuts
  
• avocados
• bran cereals
  
• wheat germ
  
• lima beans
  

High content (>6.2 mEq/100 g)

• vegetables (spinach, tomatoes, broccoli, beets, carrots, cauliflower, potatoes)
• fruits (bananas, cantaloupe, kiwis, oranges, mangoes)
• meats (ground beef, steak, pork, veal, lamb)

Source

Gennari, F. MD. Hypokalemia. N Engl J Med 1998; 339 (7): 451-458.