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Leukocyte differential and weight: obesity, malnutrition and the white blood cells

According to the NVKC, neutrophils are white blood cells that are made in the bone marrow and are part of the immune system that protects the body against pathogens such as micro-organisms. The leukocyte differential counts the neutrophils together with the four other kinds of white blood cells: lymphocytes, monocytes, eosinophils and basophils.

According to a 2015 review in American Family Physician, a raised white blood cell count can have malignant and non-malignant causes, and according to the NVKC a low lymphocyte count can arise from malnutrition or vitamin deficiencies, among other causes. Only a blood test shows how the five kinds of white blood cells are doing.

Diagnostiek voor U uses 1.5 to 7.5 /nL neutrophils (segmented) and 1.0 to 3.5 /nL lymphocytes for people older than 15; /nL is the same number as 10⁹/l.

Doctor's Assessment Included

The leukocyte differential counts the white blood cells, the cells of the immune system, by type: neutrophils, lymphocytes, monocytes, eosinophils and basophils. Each type has its own normal value, which can differ between laboratories.

  • For adults, Star-SHL uses 1.8 to 7.3 × 10⁹/l neutrophils and 1.5 to 4.0 × 10⁹/l lymphocytes; for everyone older than 15, Unilabs uses 1.5 to 7.5 × 10⁹/l neutrophils and 1.0 to 3.5 × 10⁹/l lymphocytes.
  • When the leukocyte differential is abnormal, Star-SHL also examines the blood under the microscope.

Leukocyte Differential: what this test measures

According to the NVKC, the leukocyte differential determines whether the five kinds of white blood cells are present in the right amounts and whether they have normal properties. According to the NVKC, neutrophils are also called segments, because their nucleus is divided into two to five lobes.

Leukocyte Differential: why this value matters

According to the NVKC, a leukocyte differential gives insight into how the various kinds of white blood cells are made and how they work. According to a 2015 review in American Family Physician, with a chronic inflammatory condition, such as rheumatoid arthritis or inflammatory bowel disease, the white blood cell count may be raised.

Leukocyte Differential: how the blood test works

Referral
No GP referral needed. After the order we arrange the referral through ZorgDomein, within one business day; orders after 17:00 or at the weekend start on the next business day. ZorgDomein emails a barcode, and that barcode is what the draw site needs.
The draw
A blood draw from a vein in the arm, at a partner laboratory's draw site. No home kit, no finger prick.
Where
650+ draw sites run by independent laboratories across the Netherlands. Draw sites

Leukocyte Differential: when is testing worthwhile?

According to the NVKC, neutrophils are counted when a doctor thinks there may be an infection or inflammation, usually as part of the leukocyte differential or a complete blood count.

Leukocyte Differential: symptoms of a high or low value

Low Levels

According to the NVKC, malnutrition and vitamin deficiencies can cause a low lymphocyte count in the leukocyte differential, as can HIV infection or loss of lymphocytes in the gut.

High Levels

According to a 2015 review in American Family Physician, neutrophilia, more than 7.0 × 10⁹ neutrophils per litre, can arise from, among other causes, infections, stress, chronic inflammation or medication use, and according to that article it is the most common type of raised white blood cell count.

Leukocyte Differential: causes of a low or high value

What lowers the value

  • Medicines

    A low neutrophil count is usually caused by medicines, especially painkillers and antibiotics.

  • Black African descent

    People of Black African descent tend to have lower white cell and neutrophil counts.

  • Few lymphocytes (uncommon)

    A low lymphocyte count is uncommon and can be caused by HIV infection, malnutrition, vitamin deficiencies or loss of lymphocytes through the gut.

What raises the value

  • Bacterial infection or inflammation

    In a bacterial infection and other inflammation, such as serious injuries and burns, the neutrophil count can rise.

  • Viral infection

    A raised lymphocyte count is usually caused by a viral infection.

  • Allergy or parasites

    A raised eosinophil count usually points to a parasitic infection or an allergic reaction such as hay fever, asthma or food allergy.

  • Exercise, stress, smoking, obesity or medicines

    Exercise, emotional stress, smoking, obesity and some medicines, such as corticosteroids, can raise the white cell count.

  • Blood cancer

    In some types of blood cancer the neutrophil count can be raised.

Leukocyte Differential: lifestyle and this value

An abnormal leukocyte differential goes to the GP, who according to the NVKC can use the number and type of white blood cells to work out whether the immune system is working well.

Leukocyte Differential: frequently asked questions

Can obesity raise the white blood cell count?

Yes, obesity can raise the white blood cell count in the leukocyte differential: a 2015 review in American Family Physician names obesity, smoking and certain medicines, among others, as causes of a high white blood cell count that are not malignant.

Leukocyte Differential: sources

  1. NVKC, Alles over testen: Neutrofiele granulocyten, allesovertesten.nl, geraadpleegd 2026-10-06 (retrieved 2026) allesovertesten.nl
  2. Riley LK, Rupert J. Evaluation of Patients with Leukocytosis. Am Fam Physician 2015;92(11):1004-1011. (retrieved 2026) aafp.org
  3. NVKC, Alles over testen: Lymfocyten, allesovertesten.nl, geraadpleegd 2026-10-06 (retrieved 2026) allesovertesten.nl
  4. NVKC, Alles over testen: Eosinofiele granulocyten, allesovertesten.nl, geraadpleegd 2026-10-06 (retrieved 2026) allesovertesten.nl

Tests with related values

These panels measure values from the same category as this marker.

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Leukocyte Differential

€13,-