Considerations

• High blood potassium, or hyperkalemia, often has no symptoms and is discovered during a routine blood test.
  
  

Symptoms

• High potassium symptoms include weakness, fatigue, muscle aches, nausea, shortness of breath and numb and tingling sensations.
  
  

Danger of High Potassium

• If potassium becomes excessively high, it can cause an irregular heartbeat or even a heart attack.
  
  

Levels

• Safe blood potassium is between 3.5 to 5.0 as measured by a blood test. Levels higher than 6.0 are considered dangerous.
  
  

Food

• Almost all foods contain potassium. Many fruits and vegetables are high in potassium, but many others have low levels. Bananas, tomato paste, baked potatoes, beet greens and spinach are all extremely high in potassium. See the Resources section for a list of foods high--and low--in potassium.