Define carcinogen. Discuss non dietary factors that can cause cancer.
A carcinogen is any substance, organism, or physical agent that has the potential to cause cancer by inducing changes in the genetic material (DNA) within cells. These alterations may lead to uncontrolled cell growth, which can develop into malignant tumors. Carcinogens can be _______ ___ ___ _________ ______ ________ _____.
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