<prompt> Anti-carcinogens are: PGI Dec 2007CarotenoidsFlavenoidsCurcumoidsBenzene  <response>: Ans: A Carotenoids Cancer Chemoprevention: Agents used Harrison 17th488-89 Premalignant lesions in the oropharyngeal area have responded to retinal a-tocopherol vitamin EQ, and selenium Q b carotene a carotenoid may decrease the incidence of lung, esophagus, and stomach cancer in accordance with various trials, but the definite evidence is lacking- CMDT091424 Nonsteroidal anti-inflammatory drugs NSAIDs. such as piroxicam, sulindac, and aspirin, may prevent adenoma formation or cause regression of adenomatous polyps. Diets high in calcium lower colon cancer risk Atrial comparing tamoxifen Q with another selective estrogen receptor modulator, raloxifene, showed that raloxifene is comparable to tamoxifen in cancer prevention. FinasterideQ, a 5-a-reductase inhibitor is used in prostate cancer prevention. Selenium is being tested as a prostate cancerQ preventive based on laboratory studies, epidemiologic data, and a small randomized skin cancer prevention trial that showed a significantly decreased number of prostate cancers in men taking selenium 