Our body's little hero: Everything about Erythropoietin!

Our body's little hero: Everything about Erythropoietin!

Have you ever heard of something called 'Erythropoietin' or 'EPO'? Maybe your doctor has talked about it, or if you have a condition like anemia, the name may be a little familiar to you. This is truly an amazing and very important hormone in our bodies. Today, we'll talk about it in a simple way that you can understand.

What is Erythropoietin?

Simply put, Erythropoietin is a hormone produced mainly by your kidneys. We also call it EPO for short. The main function of this EPO is to help maintain a healthy level of red blood cells, that is, red blood cells (erythrocytes) . This EPO works like a manager telling our body's red blood cell factory to 'make more!'

Sometimes, doctors use a synthetic form of erythropoietin, especially to treat anemia caused by chronic kidney disease (CKD) . Imagine, because some people's kidneys are not working properly, they don't produce enough of this EPO hormone. Then they develop anemia. That's when this synthetic EPO helps.

However, some athletes misuse it to enhance their performance. The reason is that EPO increases the amount of oxygen that reaches their muscles. That is not a good thing at all, because it can cause serious health problems.

Erythropoietin is also known by other names, such as erythropoietin, hematopoietin, and hemopoietin. However, the most commonly used names are Erythropoietin and EPO.

What does erythropoietin (EPO) do to our bodies?

This is a very important question. EPO is a major hormone that helps our body make red blood cells . Now, why do we need red blood cells? When you breathe, who carries the oxygen that comes into your lungs to every part of your body, to every cell? That's what red blood cells do. Think of it like little trucks that carry oxygen throughout your body. EPO tells these trucks to make them.

When oxygen gets to our cells, it turns into energy. This energy is essential for all our work. Then, these red blood cells carry the carbon dioxide that leaves our cells back to the lungs. From there, we exhale it.

What usually happens is this: Special cells in your kidneys sense that the oxygen level in your blood is low. When they sense that, they increase their production of EPO. This EPO then goes to the spongy part of our bones, the bone marrow , and says, 'Okay, now make more red blood cells!'

However, if the cells in the kidneys sense that there is enough oxygen in the blood, they reduce the production of EPO. This is like a supply-to-demand system. They produce more when the body needs it, and they produce less when the need is low.

Isn't it amazing how things like this happen in our bodies? Everything is so planned!

Some medical conditions can affect the amount of EPO produced by the kidneys. This can either cause too much EPO to be produced, or not enough. Both of these can cause an imbalance in red blood cell levels.

What happens if erythropoietin (EPO) levels increase?

If EPO levels increase unnecessarily, that is, if the body increases EPO without really needing it, the number of red blood cells also increases. We call this polycythemia . Simply put, there are too many red blood cells in the blood. This is also a problem, because the blood thickens and blood clots can occur.

Why do erythropoietin (EPO) levels increase?

There are several reasons why EPO levels may be unnecessarily high:

  • Living in an environment with low oxygen levels for a long time: Imagine, if a person continues to smoke, the amount of oxygen that reaches their body is low. Then the kidneys think, 'Oh, there's not enough oxygen, we need to make more red cells,' and they produce more EPO. Similarly, if a person lives in a very high altitude area like Nuwara Eliya for a long time, the EPO level may also increase due to the low oxygen level in the air there. But it is normal for EPO to increase at this altitude, it is an adaptation of the body.
  • Anemia not caused by kidney disease: Sometimes anemia is not caused by a kidney problem. But because there are too few red blood cells or the red blood cells are not working properly, the kidneys sense that they are not getting enough oxygen. Even then, they produce more EPO to help make red blood cells. This is actually a normal response of the body.
  • Certain types of tumors: Although very rare, some types of tumors can cause the kidneys to release excessive amounts of EPO.

What happens if erythropoietin (EPO) levels decrease?

The main cause of low EPO levels is chronic kidney disease (CKD) . As mentioned earlier, when the kidneys are damaged, they are unable to produce EPO properly. This results in low EPO levels. This condition, CKD, and low EPO levels can lead to anemia. This means that you may feel tired, pale, and have trouble breathing.

Why do erythropoietin (EPO) levels decrease?

Although the main cause is CKD, there is another cause. That is a condition called Polycythemia Vera . This is a type of cancer that occurs in the blood. Due to a genetic mutation, the bone marrow makes too many red blood cells. Then the kidneys feel, 'Oh, there are too many red blood cells in the blood, we don't need to make EPO anymore.' So they reduce the production of EPO. This is also a cause of low EPO.

What treatments can be done if EPO levels are low?

If EPO levels are low, it is treated by treating the underlying cause . That is, if it is kidney disease, it is treated, if it is another cause, it is treated.

However, the main treatment for anemia caused by low EPO levels is recombinant erythropoietin . These are also called erythropoietin-stimulating agents (ESAs) . These are synthetic versions of the EPO hormone that have been made in a lab. Doctors clone the EPO gene and give it to you as an injection. It then goes into your body and stimulates your bone marrow to start making more red blood cells.

This treatment is mainly given to treat anemia caused by chronic kidney failure. It is also given to people with some rare types of cancer.

But these ESAs can cause some side effects:

  • High blood pressure
  • Fever
  • Dizziness
  • Nausea
  • Pain at the injection site

Therefore, it is very important to take this treatment in the exact dosage, as advised by a doctor.

How are erythropoietin (EPO) levels measured?

Your doctor can measure your EPO levels with a simple blood test. This blood test can detect changes in your blood cells that are affecting the release of EPO. This can help determine if you have polycythemia, anemia, or other bone marrow conditions.

The doctor or nurse will choose a vein in your arm and clean the skin there with something like iodine or isopropyl alcohol. Then, a very thin needle (a 21 gauge needle - about a little smaller than the tip of an earring) will take a small sample of blood from your vein. The blood sample will be sent to a lab for analysis.

Once the lab results are in, your doctor will talk to you about them and answer any questions you may have. Remember, even if your EPO levels are within the normal range, you may still need other treatments. That will be up to your doctor to decide.

What is a normal erythropoietin (EPO) level?

Doctors measure EPO in milliunits per milliliter (mU/mL) . A healthy person's EPO level can range from 4 to 26 mU/mL.

But these values ​​are yours:

  • Age
  • Gender
  • Overall health status

It can vary depending on several factors, such as: Therefore, only your doctor can accurately interpret your results and tell you whether they are within a healthy range or outside of it. Therefore, do not make your own diagnosis based on what is available on the Internet.

Is it possible to increase erythropoietin (EPO) levels naturally?

If you have chronic kidney disease (CKD) or anemia with low EPO levels, some dietary and lifestyle changes may help to slightly increase your EPO levels. However, these should be done in addition to medical advice and not as a replacement for treatment.

  • Exercise: Research shows that when you exercise regularly, at a moderate intensity, your body uses more oxygen. Your brain then tells your body to 'make more EPO.' Things like cycling, jogging, and swimming are good examples of this type of exercise.
  • Dietary iron: Iron is a major component of hemoglobin in our red blood cells. This hemoglobin is what carries oxygen. When we talk about iron-rich foods, we mean red meat, egg yolks, legumes, and even green vegetables like spinach that we have in our village. Tofu, iron-fortified cereals, flour, and bread also contain iron.

In addition to these things, things like eating a balanced diet, drinking enough water, and avoiding smoking are also good for your overall health, and indirectly, your EPO levels.

Finally, things you need to remember

Erythropoietin (EPO) is a very important hormone that tells our bone marrow to 'make more red blood cells'.

Sometimes, our bodies make too many red blood cells, or not enough. Both of these can cause health problems. Your doctor can check the amount of EPO in your blood with a blood test and, if necessary, prescribe the right treatment. So, if you have symptoms of anemia (fatigue, paleness, shortness of breath), or if you have kidney problems, be sure to seek medical advice. They will help you in the right way. Stay healthy!


` Erythropoietin, EPO, red blood cells, anemia, kidneys, hormones, bone marrow

නිතර අසන ප්‍රශ්න (FAQ)

Why do erythropoietin (EPO) levels increase?

There are several reasons why EPO levels may be unnecessarily high:

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