Low Potassium Diet Guidelines

Introduction to Potassium Restrictions

The American Journal of Kidney Diseases recommends that individuals requiring a low potassium diet limit their intake to less than 2,000-3,000 mg per day (or 40-120 mg/kg/day for children) 1
A low potassium diet is critical for patients with chronic kidney disease (CKD) and others at risk of hyperkalemia to prevent dangerous cardiac arrhythmias and potential death 1
For adults, potassium intake should be limited to less than 2,000-3,000 mg (50-75 mmol) daily 1
For infants and young children, a reasonable starting point is 40-120 mg/kg/day (1-3 mmol/kg/day) 1
Foods containing less than 100 mg or less than 3% Daily Value (DV) of potassium are considered low in potassium 1

Choose foods with less than 100 mg potassium or less than 3% DV per serving 1
Breast milk has lower potassium content (546 mg/L) compared to standard infant formulas (700-740 mg/L) 1, 2
Restrict intake of high-potassium foods (containing 200-250 mg or greater than 6% DV per serving) 1
Foods to limit include bananas, oranges, and other potassium-rich fruits 1
Foods to limit also include potatoes and potato chips 1
Tomato products should be limited 1
Legumes and lentils should be limited 1
Yogurt should be limited 1
Chocolate should be limited 1
Avocados, nuts, seeds should be limited 3, 4

Presoaking root vegetables, including potatoes, can effectively lower potassium content by 50-75% 1
Sautéing is a cooking technique that can help reduce potassium content 1

Avoid potassium-containing salt substitutes, which can cause dangerous hyperkalemia 1
Check food labels carefully - if potassium is not listed, it doesn't mean the food doesn't contain potassium 1
For infants, formula volumes exceeding 165 mL/kg may provide excessive potassium (>3 mmol/kg) 1, 2
Patients with chronic kidney disease should not follow high-potassium diets recommended for hypertension management 3, 5
When hyperkalemia persists despite dietary restriction, investigate non-dietary causes such as metabolic acidosis 1
Medications (ACE inhibitors, angiotensin-receptor blockers, NSAIDs, potassium-sparing diuretics) can contribute to hyperkalemia 1, 6
Constipation can worsen hyperkalemia 1
Inadequate dialysis can contribute to hyperkalemia 1
Tissue breakdown due to catabolism, infection, or surgery can contribute to hyperkalemia 1