RAK immune cells—the body's "special forces"—precisely target and eliminate diseased cells, effectively eliminating tumor cells. They act as the body's "intelligent doctors," automatically scanning for viruses and abnormal cells to protect health.

Type: A third group of lymphocytes, alongside T and B cells.

Origin and Distribution: Produced in bone marrow, accounting for approximately 10%–15% of total lymphocytes in peripheral blood.

Characteristics: By activating the body's active immunity, they enhance the body's immune capacity and antiviral, anti-infective, anti-inflammatory, and anti-tumor functions. They mobilize the body's immune function to kill tumor cells, improve the body's own immune defense function, and simultaneously adjust the balance and mutual regulation among immune cells, enhancing the stability of immune cells in the body, killing tumor cells, restoring the balance of the internal environment, and bidirectionally regulating immune function.

Functions: Primarily regulates cell stability, maintains the balance of immune cells in the body, acts as a natural killer cell stimulator, stimulates cells in enhanced immunotherapy, and inhibits and kills tumor cells.