American ginseng is the root of American ginseng, a plant of the ginseng family. It has the effect of tonifying qi and nourishing yin, clearing heat and promoting the production of body fluid. It is mainly used for treating qi and yin deficiency, lung qi deficiency and lung yin deficiency, thirst and thirst in febrile diseases with deficiency of qi and fluid. Modern research has found that American ginseng contains ginsenosides, ginsenosides, polysaccharides, proteins, amino acids, nucleic acids, peptides, fatty acids, organic acids, etc. It has the ability to enhance immunity, strengthen the body’s non-cancer function. It has the functions of enhancing immunity, strengthening non-specific antibody of the body, lowering blood sugar, lowering blood fat, improving blood indexes and so on. Modern pharmacological studies have shown that in mice experiments, American ginseng stem and leaf saponin can promote the expression of T cell secretion cytokine interleukin-2, indicating its role in improving the body’s cellular immune function. The aqueous extract of American ginseng can also significantly reduce the content of serum urea nitrogen and blood lactate in mice after exercise, with good anti-fatigue effect; it can also prolong the survival time of low-pressure hypoxia and asphyxiated mice, with good anti-hypoxia effect. The adverse effects of American ginseng are not clear. American ginseng should not be used with quassia. Existing evidence confirms that American ginseng can improve immunity, but it should be noted that, when a medical condition arises, it is necessary to consult a doctor in time, under the doctor’s guidance of the identification of medication, do not take medication on your own.