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NCI Dictionary of Cancer Terms

Se-methyl-seleno-L-cysteine  listen  (… MEH-thul-seh-LEE-noh-L-SIS-teh-een)

  A substance that contains the element selenium (a nutrient that protects cells against damage) and is found in certain plants such as garlic and broccoli. Se-methyl-seleno-L-cysteine can act as an antioxidant and may help prevent or slow the growth of cancer cells. It is a type of amino acid.