Total Leukocyte Count (TLC), alternatively referred to as Total White Blood Cell Count, is a lab test that counts all of the leukocytes, or white blood cells, in a given amount of blood. Leukocytes are an essential part of the immune system and are responsible for protecting the body from infections and foreign invaders.

White blood cells of different kinds, such as neutrophils, lymphocytes, monocytes, eosinophils, and basophils, are included in the total leukocyte count. Different types of white blood cells have distinct roles in the immune response, including phagocytosis, which involves engulfing and eliminating pathogens, antibody production, and inflammatory regulation.

Within the framework of Health Heart Diagnostics (HHD), TLC can offer significant insights into the immune system and general health of the body. Although TLC alone might not be