Diet on Haemodialysis: What to Eat and What to Limit
Posted 16 Jul 2026 | Source:
Diet is an important part of staying well on haemodialysis, and its principles differ in some important ways from the dietary advice given earlier in kidney disease. Because dialysis replaces only part of the kidneys’ work and happens only a few times a week, what you eat and drink between sessions has a direct effect on how you feel and on your safety. This article explains the main dietary principles on haemodialysis, while stressing that your own plan should be individualised with a dietitian.
How diet changes once dialysis begins
A point that surprises many people is that dietary advice can change — sometimes substantially — once dialysis begins. For example, protein, which may have been moderated before dialysis, is needed in greater amounts once on dialysis, because the dialysis process itself removes some protein and the body’s needs increase. Conversely, the need to manage fluid, potassium, and phosphate often becomes more pronounced. This is why dietary advice from the pre-dialysis period should not simply be continued unchanged, and why a fresh dietary plan for dialysis is important.
Protein: eating enough
On haemodialysis, getting enough good-quality protein becomes a priority. Dialysis removes some protein, and being well nourished with adequate protein is strongly linked to feeling well and to better outcomes. People on dialysis are therefore generally encouraged to eat sufficient protein from good sources. This is a significant shift from the protein moderation sometimes advised earlier, and it illustrates why dialysis diet advice needs to be specific to this stage. Your dietitian will advise on the right amount and sources for you.
Fluid management
Managing fluid is one of the central dietary tasks on haemodialysis. Because the kidneys remove little or no fluid and dialysis removes it only during sessions, fluid taken in between sessions accumulates. Taking in too much fluid between sessions leads to weight gain from fluid, swelling, breathlessness, and the need to remove large amounts during dialysis, which can cause uncomfortable symptoms such as cramps and a drop in blood pressure. People on haemodialysis are therefore usually advised to limit their fluid intake to a recommended amount, individualised to them. Managing thirst — helped greatly by reducing salt — is key to making this achievable.
Salt
Reducing salt is important on dialysis for two connected reasons: it helps control blood pressure and fluid retention, and it reduces thirst, making fluid limits easier to keep. As ever, much dietary salt is hidden in processed foods, pickles, papads, packaged snacks, and restaurant meals. Reducing these, and not adding extra salt, helps considerably. Salt substitutes are not a simple solution, as many replace sodium with potassium, which brings its own risk on dialysis, so they should only be used with advice.
Potassium
Potassium management is often important on haemodialysis, because potassium accumulates between sessions and high levels can affect the heart. Whether and how much to limit potassium depends on your blood levels, which are monitored. If your levels tend to be high, your dietitian will guide you on moderating high-potassium foods — certain fruits, vegetables, and other items discussed in a dedicated article — and on techniques such as leaching for certain vegetables. The aim is to keep potassium safe while still eating a varied diet.
Phosphate
Phosphate also tends to accumulate in kidney failure, and dialysis removes it only to a limited extent, so managing it is usually part of the dialysis diet. This involves moderating high-phosphate foods, particularly processed foods, colas, and certain dairy products, and very often taking phosphate binder medications with meals, which reduce the amount of phosphate absorbed from food. Taking binders correctly, with meals, is an important part of phosphate control and works alongside the dietary measures.
Balancing all of this: the role of the dietitian
Reading through these requirements — enough protein, limited fluid, reduced salt, controlled potassium and phosphate, adequate overall nutrition — it is clear that the dialysis diet involves balancing several considerations at once, some of which can seem to pull in different directions. This is precisely why the guidance of a dietitian experienced in kidney disease is so valuable. They can translate these principles into a practical, enjoyable diet suited to your tastes, your blood results, and your circumstances, and adjust it over time. Trying to manage all these factors alone, from generic information, is difficult and can lead to either dangerous imbalances or unnecessary, harmful restriction.
Avoiding malnutrition
A crucial counterbalance to all the “limits” is the importance of eating enough. Poor appetite is common on dialysis, and the various restrictions, if applied too zealously, can tip a person into malnutrition, which is strongly linked to worse outcomes. Good dialysis nutrition is therefore as much about ensuring adequate intake of protein and energy as it is about limiting particular things. Your dietitian keeps this balance in view, ensuring that you stay well nourished while managing the specific dietary challenges of dialysis.
The takeaway
Diet on haemodialysis has its own distinct principles: enough protein, careful fluid and salt management, attention to potassium and phosphate, and above all adequate overall nutrition. These differ from earlier kidney disease advice, and they need to be individualised to you. Working with a dietitian to build a plan suited to your results and your life is the best way to eat well, feel well, and stay safe on dialysis.
Diet on dialysis is best tailored to your individual needs and blood results. A nephrologist, working with a dietitian, can help you build a practical plan. A video consultation is a convenient way to discuss your diet.
