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Home >Information for Patients > Dictionary Index

Dictionary of Cancer Terms

View in Spanish: Melatonina

Melatonin (MEH-luh-TOH-nun)
A hormone made by the pineal gland (tiny organ near the center of the brain). Melatonin helps control the body’s sleep cycle, and is an antioxidant. It is also made in the laboratory and sold as a supplement.



 
 
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.