English: Preparing grill for grilling, grill with flames and cones. Česky: Příprava grilu pro grilování, gril s plameny a šiškami. (Photo credit: Wikipedia)
It's summer and the barbecue is all fired up. You can smell it from your neighbors backyard and you are salivating. Don't jump over the fence quite so fast. Think before you eat! The longer meat is cooked, the more dangerous it becomes.
Consider this: You are serving cancer-causing food from the grill.
The blackened areas on charred and grilled flesh foods (meat, poultry, fish) are a source of carcinogenic chemicals. These chemical directly damage DNA, our genetic material, and initiate mutations that can lead to the development of cancer.
When the proteins are heated to the point that the flesh starts to brown and blacken, you have the presence of heterocyclic amines (HCA), some of which are known carcinogens. HCAs form when extreme heat causes a chemical reaction between the amino acids naturally found in proteins and creatine found in muscle meats. HCAs are also found in broiled and well-done red meats. Other high-temperature cooking methods such as frying also produces\ these dangerous chemicals.
Diets with high exposures to HCAs are correlated with higher rates of cancers of the pancreas, colon and digestive tract. (Learn how to reduce risk of colon cancer naturally.)
HCAs can directly damage your DNA, initiating cancer. The highest levels of HCAs are found in grilled poultry, steaks, salmon grilled with the skin, well-done hamburgers and barbecued pork such as spare ribs.
And when the fat drips onto the coals and there is a flare, polycyclic aromatic hydrocarbons (PAHs), another family that may contain carcinogens. are formed. The smoke carries these hydrocarbons and coat the food we eat. PAHs also form with charring. Exposure to PAHs are correlated with increased rates of stomach cancer.
Three groups of foods can form cancer-causing chemicals when grilled and blackened:
- all meats such as beef, lamb and pork
- poultry such as chicken and turkey
- fish and shellfish
What to do to keep your family safe?
The safest thing to do is to give up grilling, frying, cooking at high temperatures, and overcooked and well-done meats
- Cook with less intense heat and lower temperatures with all cooking methods
- Use hardwood chips from hickory and maple which burn cooler than softwoods such as pine and fir
- Use charcoal briquettes, which burn at lower temperatures
- Be sure to oil your grill to keep food from sticking
- Keep your grill clean
- Scrape off all the charred residue every time you cook so that you don't transfer carcinogenic chemicals to your food the next time you use it
- Avoid well-done meats
- Avoid the blackened and charred areas
- Use lower temperatures on the grill
- Use thinner cuts, which cook quickly
- Flip the filets before they are charred
- Trim the fat before cooking
- Use leaner cuts
- Remove the skin from chicken and salmon
- Defrost all meat before grilling
- Cut meats up into cubes, which cook very quickly
- Don't cook directly over coals, move them to the side
- Keep the grill rack farther away from the food rather then right on top of the coals
- Avoid having flames come in contact with the food
- Use a drip rack to catch the fat
- Remove food from the grill as soon as it is cooked
- Don't put cooked food back onto plates used for raw meat, poultry or fish due to bacteria
Use Alternate Cooking Methods
- Bake (but do not overcook)
- Cook with liquid: boil, steam, poach, stew
- Slow-cook food at low temperatures in the oven so that it is thoroughly cooked and moist and then put it on the grill briefly to just sear it.
- Marinated foods produce less HCAs and PAHs when cooked. Some research shows that marinating your meats not only makes them taste better, but also reduces the production of carcinogens.
Eat More Colorful Fruits And Vegetables
Plant-based diets contain the fewest cancer promoters. Plant-based diets also provide an abundance of cancer-fighting plant chemicals. Plant-based diets reduce oxidative stress that leads to DNA damage. Plant-based diets lead to lower levels of inflammation which is an environment that is protective to the cells and the DNA, inhibiting cancer rather than promoting it.
Try grilling vegetables and fruits, which do not form cancer-causing chemicals when cooked at high heats.
Try grilled asparagus, bell peppers, carrots, zucchini, eggplants, onions, portobello mushrooms, even mangoes brushed with a little olive oil. Try soy burgers and veggie burgers instead of meat.
These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure or prevent any disease.
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1. U.S. Department of Health and Human Services, Public Health Service, National Toxicology Program. 2005. 11th Report on Carcinogens. Available at http://ntp.niehs.nih.gov/ntp/roc/toc11.html.
2. Sinha R, Rothman N, Brown ED, Salmon CP, Knize MG, Swanson CA, Rossi SC, Mark SD, Levander OA, Felton JS. High concentrations of the carcinogen 2-amino-1-methyl-6-phenylimidazo- [4,5-b]pyridine (PhIP) occur in chicken but are dependent on the cooking method. Cancer Res. 1995 Oct 15;55(20):4516-9.
3. Sinha R, Rothman N, Salmon CP, Knize MG, Brown ED, Swanson CA, Rhodes D, Rossi S, Felton JS, Levander OA. Heterocyclic amine content in beef cooked by different methods to varying degrees of doneness and gravy made from meat drippings. Food Chem Toxicol. 1998 Apr;36(4):279-87.
4. Murray S, Lynch AM, Knize MG, Gooderham MJ. Quantification of the carcinogens 2-amino-3,8-dimethyl- and 2-amino-3,4,8-trimethylimidazo[4,5-f]quinoxaline and 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine in food using a combined assay based on gas chromatography-negative ion mass spectrometry. J Chromatogr. 1993 Jul 2;616(2):211-9.
5. Kataoka H, Nishioka S, Kobayashi M, Hanaoka T, Tsugane S. Analysis of mutagenic heterocyclic amines in cooked food samples by gas chromatography with nitrogen-phosphorus detector. Bull Environ Contam Toxicol. 2002 Nov;69(5):682-9.
6. Nagao, M and Sugimura, T. Food Borne Carcinogens: Heterocyclic Amines. John Wiley & Sons, Ltd. New York: 2000.
7. Jagerstad M, Skog K, Grivas S, Olsson K. Formation of heterocyclic amines using model systems. Mutat Res. 1991;259:219-33.
8. Skog KI, Johansson MAE, Jagerstad MI. Carcinogenic heterocyclic amines in model systems and cooked foods: a review on formation, occurrence, and intake. Food and Chem Toxicol 1998;36:879-96.
9. Robbana-Barnat S, Rabache M, Rialland E, Fradin J. Heterocyclic amines: occurrence and prevention in cooked food. Environ Health Perspect 1996;104:280-8.
10. Thiebaud HP, Knize MG, Kuzmicky PA, Hsieh DP, Felton JS. Airborne mutagens produced by frying beef, pork, and a soy-based food. Food Chem Toxicol 1995;33:821-8.
11. World Cancer Research Fund. Food, nutrition, and the prevention of cancer: A global perspective. American Institute of Cancer Research. Washington, DC: 1997.
12. Felton JS, Knize MG, Salmon CP, Malfatti MA, Kulp KS. Human Exposure to Heterocyclic Amine Food Mutagens/Carcinogens: Relevance to Breast Cancer. Environmental and Molecular Mutagenesis. 2002: 39;112-118.
13. Knize MG, Felton JS. Formation and Human Risk of Carcinogenic Heterocyclic Amines Formed from Natural Precursors in Meat. Nutr Rev. 2005 May;63(5):158-65.
14. World Cancer Research Fund. Food, nutrition, and the prevention of cancer: A global perspective. American Institute of Cancer Research. Washington, DC: 1997.
15. Norat T, Riboli E. Meat consumption and colorectal cancer: a review of epidemiologic evidence. Nutr Rev. 2001 Feb;59(2):37-47
16. Forman, D. Dietary exposure to N-nitroso compounds and the risk of human cancer. Cancer Surv. 1987;6(4):719-38.
17. Willett WC, Stampfer MJ, Colditz GA, Rosner BA, and Speizer FE. Relation of meat, fat, and fiber intake to the risk of colon cancer in a prospective study among women. N Engl J Med. 1990 Dec 13;323(24):1664-72.
18. Nöthlings U, Wilkens LR, Murphy SP, Henderson BE, Kolonel LN. Meat intake increases the risk for pancreatic cancer: The Multiethnic Cohort. Poster presented at: American Association for Cancer Research; April 20, 2005; Anaheim, CA.
19. De Stefani E, Correa P, Boffetta P, Deneo-Pellegrini H, Ronco AL, Mendilaharsu M. Dietary patterns and risk of gastric cancer: a case-control study in Uruguay. Gastric Cancer. 2004;7(4):211-20.
20. Fraser GE. Associations between diet and cancer, ischemic heart disease, and all-cause mortality in non-Hispanic white California Seventh-day Adventists. Am J Clin Nutr 1999;70(suppl):532S-8S.
21. Butler LM, Sinha R, Millikan RC, Martin CF, Newman B, Gammon MD, Ammerman AS, Sandler RS. Heterocyclic amines, meat intake, and association with colon cancer in a population-based study. Am J Epidemiol. 2003;157:434-45.