The normal microbiota forms a symbiotic relationship with the body, which is closely related to the body’s health or disease state. Although the composition of the microbiota in the body is af-fected by factors such as age, environment, and lifestyle, it is in a stable state under normal physiological conditions. The microbiota can participate in the regulation of physiological processes such as metabolism, inflammation and immune response, and maintain the body’s local homeostasis. In recent years, more and more studies have shown that the microbiota is related to the occurrence of cancer. This article will review the research evidence that the microbiota affects the occurrence and development of tumors, as well as the types of microorganisms involved, to provide a basis for the precise prevention and treatment of cancer.
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