12/04/2026
🩺 💚 Potassium & Kidney Disease
What is potassium?
Potassium is an essential mineral and a key electrolyte, meaning it carries an electrical charge when dissolved in water. ⚡💧
This electrical activity is what allows it to support many vital functions in the body.
💡 What does potassium do?
Potassium helps:
✔️ Maintain fluid balance
✔️ Support healthy nerve signalling
✔️ Regulate heart rhythm and muscle contractions ❤️
✔️ Maintain pH balance
✔️ Support blood vessel relaxation
✔️ Assist hormone secretion (including ADH and aldosterone)
✔️ Regulate blood sugar
✔️ Aid protein synthesis
✔️ Support overall cellular function
It plays a far bigger role than most people realise.
🌿 A potassium-rich diet may help:
✨ Lower blood pressure
✨ Reduce water retention
✨ Protect against stroke
✨ Support bone health
✨ Potentially reduce kidney stone formation
For individuals with healthy kidney function, potassium is usually well regulated. The body absorbs what it needs and excretes excess amounts through urine.
🩺 What changes in CKD?
In chronic kidney disease (CKD), the kidneys may struggle to excrete excess potassium efficiently.
This can lead to elevated potassium levels (hyperkalaemia), which may affect heart rhythm and become dangerous if not monitored.
This is why potassium intake often needs to be individualised in CKD, not automatically restricted, but carefully assessed based on:
• Kidney function stage
• Blood test results
• Medications
• Overall dietary pattern
Potassium is not “good” or “bad.”
It’s essential, but in CKD, balance becomes critical.
If you’re living with kidney disease, have you had discussions about potassium with your healthcare provider? 💬💚