6. Avocados
Hyperkalemia is the name for having too much potassium in the blood, and this happens in people with advanced kidney disease. It often causes nausea, weakness, numbness, and slow heart rate.
Luckily, you needn’t worry too much about avocados or potassium if you don’t have pre-existing kidney disease. Most of us don’t get enough potassium in our daily diets anyway.