NK Score™ is the first test commercially available to measure NK (natural killer) cell activity.


NK cell activity indicates how well your body can defend itself against infectious or cancer cells.

Determining NK cell activity is just as important as performing other blood tests, such a complete blood count.

Based on your results, your doctor may recommend lifestyle changes and/or screening tests.



What is an NK cell?

A part of the innate immune system, NK cells are a type of lymphocyte (white blood cell) that is is produced in bone marrow. There are two important roles of NK cells, which are the immune surveillance of cancer and recognition of viral-infections.

NK cells and immunity

In the average human body, there are more than 5,000 abnormal cells such as cancer cells, growing and dying every day. The NK cell is the only cell that recognizes and attacks cancer cells, which can inhibit from the proliferation of cancer cells and prevent from recurrence.