Nordion Inc. (TSX: NDN, NYSE: NDZ) is a global health science company that provides products used for the prevention, diagnosis and treatment of disease. The company supplies targeted therapies, sterilization technologies and medical isotopes to more than 60 countries around the world.

Nordion is headquartered in Ottawa, Ontario, Canada and generates about 65% of its revenue from within North America. Nordion generated $274 million USD in revenues from continuing operations in the 2011 fiscal year.

Steve West is the company's CEO.

Founded in 1946, originally the radium sales department of Eldorado Mining and Refining Ltd., Nordion developed one of the first teletherapy units that used the radioisotope cobalt-60 to destroy cancerous tumours.

Soon after, the division was given responsibility for selling radioisotopes produced by the newly established nuclear research facility at Chalk River, Ontario. As a result, in 1951, Eldorado established a commercial products division (CPD) to manage the isotope business, especially cobalt-60 used in cancer treatment.