Anaemia in Chronic Kidney Disease: Causes and Treatment
Posted 01 Jul 2026 | Source:
If you have chronic kidney disease and feel persistently tired, short of breath, or simply not yourself, anaemia may be part of the explanation. Anaemia — a shortage of healthy red blood cells — is one of the most common complications of kidney disease, and it is also one of the most treatable. Understanding why it happens and how it is managed can help you feel considerably better.
What is anaemia?
Red blood cells carry oxygen from the lungs to every part of the body. Anaemia means there are too few of them, or too little of the oxygen-carrying pigment haemoglobin that they contain. When tissues receive less oxygen, the result is tiredness, weakness, breathlessness on exertion, a pale appearance, poor concentration, and sometimes a faster heartbeat. Because these symptoms come on gradually, people often attribute them to ageing or stress rather than to a treatable condition.
Why kidney disease causes anaemia
The main reason kidney disease causes anaemia is the loss of a hormone called erythropoietin. Healthy kidneys produce this hormone, which travels to the bone marrow and signals it to make red blood cells. As kidney function declines, erythropoietin production falls, and the bone marrow makes fewer red cells. This is the central mechanism, and it explains why anaemia becomes more common as kidney disease advances.
There are usually additional contributing factors. People with kidney disease are often short of iron, which is the raw material for making haemoglobin — either because of reduced absorption, dietary factors, or small ongoing blood losses. Inflammation, which is common in kidney disease, also interferes with the body’s use of iron. Shortened red blood cell survival and deficiencies of vitamins such as B12 and folate can play a part too. Effective treatment depends on identifying which of these factors are at work.
How anaemia in kidney disease is assessed
Assessing anaemia involves a simple blood count to measure haemoglobin, together with tests of iron status to determine whether iron stores are adequate and whether iron is available for use. Other tests may check vitamin levels and exclude alternative causes of anaemia unrelated to the kidneys. This assessment matters, because treatment is tailored to the cause: giving the wrong treatment, such as a red-cell-stimulating injection when the real problem is iron deficiency, is ineffective and potentially unhelpful.
How anaemia in kidney disease is treated
Correcting iron deficiency.
Because iron is so often lacking, replenishing it is frequently the first step. Iron can be given by mouth, but in kidney disease it is often given directly into a vein, which is more reliable and effective, particularly for people on dialysis. Restoring iron stores alone can substantially improve haemoglobin in many people.
Erythropoiesis-stimulating agents (ESAs).
These are manmade versions of the erythropoietin hormone that the kidneys can no longer produce in sufficient quantity. Given by injection, they stimulate the bone marrow to produce more red blood cells. They are highly effective and have transformed the management of anaemia in kidney disease. Treatment aims for a target haemoglobin range that improves symptoms and quality of life while avoiding the risks associated with raising it too high — a balance that your doctor will manage with regular monitoring.
Newer oral options - HIF-PHIs (Desidustat)
In recent years, a newer class of oral medications has become available in some settings for treating anaemia of kidney disease, offering an alternative to injections for certain patients. The availability and suitability of these vary, and your nephrologist can advise whether they are appropriate for you. I would suggest discussing the current options specifically, as this is an evolving area.
Addressing other deficiencies.
Where vitamin B12 or folate is lacking, these are replaced. Underlying contributors such as inflammation or blood loss are addressed where possible.
Why treating anaemia is worthwhile
Treating anaemia in kidney disease does more than improve a number on a blood test. People whose anaemia is well managed typically feel more energetic, breathe more easily, think more clearly, and are able to do more in their daily lives. Good management also reduces strain on the heart, which has to work harder when the blood carries less oxygen. For people on dialysis or preparing for a transplant, well-controlled anaemia contributes to better overall health.
A balanced note on targets
It is worth knowing that the goal of treatment is not to make the haemoglobin completely normal. Research has shown that aiming too high carries its own risks, so doctors aim for a carefully judged target that relieves symptoms while remaining safe. If you are receiving treatment for anaemia, your haemoglobin and iron levels will be monitored regularly so that the dose can be adjusted to keep you in this safe and beneficial range.
Persistent tiredness in kidney disease is often treatable. A nephrologist can assess whether anaemia is contributing and arrange the right treatment. A video consultation is a convenient way to review your blood results.
