Real People Stories – Jeniffer 

Viral or bacterial load? B12 deficiency? Hypoxia? What can be determined by a General CBC Blood Test?

I take great care to maintain my health, and about once every six months, I take a complete count (CBC) and urine test to monitor my iron deficiency and general health. Doctors traditionally prescribe this test to all patients, whether GPs, gynaecologists, endocrinologists, or other specialists. Why is it important to pass interesting facts?

Blood is a liquid that flows through veins and arteries. It supplies muscles, organs, and tissues with oxygen, which we all need for normal life. The heart contracts constantly to pump.

General Interesting Data

  • Volume = 5-6 litres, 6-8% of body weight.
  • 3-4 litres is the volume circulating
  • 1.5-2 litres are deposited in the vessels of the abdominal organs, subcutaneous tissue, etc.
  • It consists of plasma (yellowish liquid) and formed elements of the blood (erythrocytes, leukocytes, platelets)
  • The pH 7.35-7.45


  • Transport (carries oxygen)
  • Respiratory 
  • Nutritious (trophic) 
  • Excretory
  • Thermoregulatory 
  • Protective
  • Humoral (regulatory)
  • Homeostatic

Blood performs many functions, and the CBC test can monitor the body’s overall condition.

So, briefly about the procedure itself.

Preparation and Delivery

The sample should be taken on an empty stomach in the morning, ideally 14 hours without food. Then, the result will be more indicative, but usually, the references are 8-14 hours of fasting.

The evening before the test, avoid alcohol, fatty and fried foods.

You can drink a little water in the morning; even those with “thick” or heavy issues need it.

Come and sit down at the lab technician’s table; the required area is wiped with alcohol and either pierced with a needle, or it is taken with a syringe or butterfly. 

The butterfly method is the most invisible and painless way to take material because it takes material from children. Usually, they take it almost painlessly, but some clumsy ones leave bruises.

I have never had any bruises after taking blood.


I usually do a general Anaemia blood test, but sometimes I do a white cell count.

But what is the leukocyte formula: 

The leukocyte formula is the percentage ratio of different types of leukocytes (neutrophils, lymphocytes, eosinophils, monocytes, and basophils).

Components Analyzed

What do they look at on the CBC checkup: 

  • Erythrocyte

There are many erythrocytes, the main cells. Their function is precisely respiratory because haemoglobin is transferred to them. 

Their structure maintains the pH, participates in clotting, and contains antigens determining a person’s type. 

The volume of erythrocytes is the haemoglobin content in the erythrocyte as a percentage and in absolute terms. The red cell distribution weight index (RDW) measures the size of the smallest and largest cells. And this difference in ratios is calculated. Normally, all red cells should be approximately the same size. 

Red cells are generally the main carriers of oxygen; as I already said, they contain haemoglobin. This is the largest cell mass, amounting to as much as 2 kg. And here is an important point: red cells live only 100-120 days.

Therefore, monitoring Anaemia composition for three months after some nutritional support is better to see the changes fully.

  •  Leukocytes

They protect us from various microorganisms, bacteria, and toxins, participate in immune reactions, are responsible for healing damaged tissues, clotting, and transport, and also carry some substances.

Leukocytes, in turn, are a large group with many subgroups. 

If leukocytes are elevated, then the bacterial load, while IV drips are not allowed, and neutrophils are often normal or elevated.

  • Lymphocytes

They are divided into different subgroups.

There are killer lymphocytes, helpers, suppressors, T cells of the immune system and B lymphocytes.

Lymphocytes themselves form protective antibodies for us. 

They absorb and destroy foreign cells, form specific immunity, and provide immunological memory. 

If a person, for example, had chickenpox and everything was going well with his immunity at that time, the function of lymphocytes would be preserved. He would develop immunity. However, if there are such cases, more often race, where people can get chickenpox twice in their life, then this indicates that their leukocytes did not work well, and this specific immunity did not form.

Lymphocytes are also responsible for the formation of immunity after vaccinations.

  • Platelets

They are not truly cellular formations.

They represent detached parts of the protoplasm of megakaryocytic of the bone marrow.

  • Haemoglobin

Decreased in various types of anaemia,

increased – often with dehydration, hypoxia. In pregnant women, haemoglobin fluctuates throughout the day.

  •  ESR

Increased during pregnancy, deficiency of B9, B12, and inflammatory diseases.

  • Eosinophils

Increased in parasitic diseases, allergies, hypothyroidism, autoimmune diseases, and rheumatism.

And this is only a small part! 

I recommend that everyone undergo a CBC report every six months. Tests are affordable, and the results are delivered quickly.

Why 4 stars?

Although it is informative, there is always a human factor that can distort the result. Incorrect blood collection, storage and transportation, and many companies also save on equipment maintenance…

So, besides the CBC, I recommend taking other tests, which I will gradually talk about here.

Thank you for reading to the end! Good health to all 💙


Is a blood test always accurate? Why can’t it be done quickly?

Once a year, you should have a CBC or other type of blood profile.

To do this, come between 8 and 11 o’clock, sit in line, and then they will take blood from your finger. A special device will print and show the results. And here is the catch: it is much better to check the blood manually, and the results are more accurate since the device can give results with errors. Of course, you must take the test on an empty stomach, so you can’t have breakfast. It is inconvenient because you want to avoid getting up in the morning, and it spoils your mood.

For me, the worst, most unpleasant thing is the test itself because the finger prick is the most painful. For me, a vein option is better than when they make a small cut on the finger. In the report, they give the reference range, and if at least three indicators are outside the reference range, it is suspicious, although the doctor does not pay attention to this. He knows the machine can have errors.

Tips for Accurate Results

To avoid errors in the analysis, you should not eat before the procedure, not worry, not be nervous, try to get enough sleep, not quarrel with anyone, not watch any horror films at night, and also not leave any questions unfinished so as not to worry about them all night. Any little thing, any neurosis, makes the analysis not so wonderful, and you will have to retake it so everything runs smoothly. It is nice that it takes a little time. Take the test and go home calmly; you will receive the results in a day.

However, there are always doubts that the result is correct, so you should not attach importance to an increased indicator because it may be an error of the device (for example, my relative lymphocyte indicator is always increased). An Anaemia blood test does not give a complete picture, but it is a good primary diagnosis to consider and take action on.

I recommend everyone do a CBC exam to avoid missing any inflammatory process and monitor their health.