Glossary of Medical Terms

beta-glucan

A substance found in bacteria, plants, and certain foods, such as baker’s yeast, cereal grains, and mushrooms. It is a type of polysaccharide that is made of a string of glucose (sugar) molecules joined together. Beta-glucan may stimulate the immune system and help kill cancer cells. It is being studied in the treatment of cancer. It is a type of biological response modifier.

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