Danger! High Cooking Heat
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Image "barbeque grill perspectives" used with permission by rdevies (2011) https://openclipart.org/search/?query=BBQ
Cooking meats at very high temperatures and residue left in cooking utensils creates chemicals that may be harmful and lead to cancer. Grilling, frying, broiling and other ways of cooking at high temperatures may increase the risk of developing colorectal cancer.
Reference
Parr, C. L., Hjartaker, A., Lund, E., & Veierod, M. B. (2013). Meat intake, cooking methods and risk of proximal colon, distal colon and rectal cancer: The Norwegian women and cancer (NOWAC) cohort study. International Journal of Cancer, 133, 1153-1163.