contaminated

contaminated,

v 1. made radioactive by the addition of small quantities of radioactive material.
2. made contaminated by adding infective or radiographic materials.
3. an infective surface or object.

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Patient discussion about contaminated.

Q. I'm concerned that my calcium supplements are contaminated w seashells or cow bones. Which brands are best

A. there should be labeled as "from animal source".
here is something that helped me choose:
http://www.mayoclinic.com/health/calcium-supplements/AN00964