Rhodiola Rosea Extract stimulates the immune system in two ways: FIRST,by specific direct stimulation of immune defence (stimulates one of the most important type of immune cells,Natural Killer Cells, NK-Cells seek and destroy the infected cells on our bodies). Rhodiola rosea normalises the immune system by improving T-cell immunity Rhodiola Rosea Extract has been shown to increase the body's resistance to toxins that may accumulate during infection development.Second,by making a person less susceptible to stress. Scientists found out that stress suppresses immunity and destroys our resistance to various forms of bacterial or virus attack. Due to the natural killer cell's effect on tumours Rhodiola rosea may enhance B cell immunity by preventing the suppression of B cell immunity, which can occur during stress. Being under stress, a great portion of the body's energy is expended for nothing. When we are chronically exposed to stress that continually robs energy from other systems. The general effect is a lowered immune response and decreased health.