Potassium restriction CKD – pros and cons
Have you ever asked yourself what is the evidence for potassium restriction in CKD? Or should potassium be restricted in CKD? We will answer these questions in this article.
In fact the whole area was debated recently by Bernier-Jean in 2022.
The practice of recommending a low-potassium diet to patients with chronic kidney disease (CKD) is widespread despite being mostly based on opinion – not scientific evidence.
Several research studies have shown usual average potassium consumption is only weakly linked to potassium levels in the blood, even in the presence of severe kidney failure.
Concerns have been raised over the relevance of the practice considering that it often restricts the intake of fruits, vegetables, and other foods of high nutritional value – and may substantially impact patients’ quality of life.
Furthermore, a high potassium intake has been repeatedly shown to be linked to a reduction in the risk of chronic kidney disease progression and mortality.
On the other hand, no long-term trials have convincingly demonstrated what daily amount of dietary potassium consumption is beneficial and safe at the different stages of CKD.
Conclusion
There is considerable uncertainty about the pros and cons of potassium restriction (or pushing) in patients with CKD. It is best to discuss the issue, on an individual basis, with your kidney specialist (nephrologist), nurse or dietitian.
Summary
We have discussed potassium restriction in CKD – and its pros and cons. We hope it has been helpful.
Other resources
These are good review articles, mainly for health professionals: Clegg, 2020 and Picard, 2o2o.
Here is information on potassium restriction from the UHCW Coventry renal team. You should not do this unless asked to my your kidney team.
Last Reviewed on 27 November 2023