1. About 75% of women’s dietary nitrates came from fruits and vegetables.
2. Nitrates Many foods, especially cured meats such as bacon and hot dogs, use nitrates to preserve color and maintain microbial safety. Nitrate is harmless, but it can convert to nitrite, which can form nitrosamines, a powerful cancer-causing chemical, in your body. Whenever possible, look for nitrate-free preserved meats. When you do eat foods containing nitrates, have a glass of orange juice at the same time (for instance, orange juice with your morning bacon). Vitamin C is known to inhibit the conversion to nitrosamines in your stomach.
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2006-08-09 03:17:11
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answer #2
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answered by Elsibeth 1
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Nitrates—chemical preservatives used in cured meats, such as ham, bacon, and hot dogs—have been found to cause cancer in animals when consumed in high doses. .
Because of the preservatives' possible link to cancer, the U.S. Food and Drug Administration has limited the amount of nitrates in meats, particularly bacon. Until further research is done, the benefits of adequate preservation of foods seem to outweigh the risks.
--- In laboratory tests, garlic and onions block the formation of a potent carcinogen better than their milder cousin, the leek, a Penn State study has found.
Dr. John Milner, professor and head of the Department of Nutrition in Penn State's College of Health and Human Development, is leader of the study. He says the results are consistent with epidemiological evidence from China which shows that those who have a higher consumption of vegetables from the onion family have a reduced cancer risk.
The Penn State results are reported in the current issue (Vol. 28, No. 1) of the journal, Nutrition and Cancer, in a paper titled, "S-Allyl Cysteine Inhibits Nitrosomorpholine Formation and Bioactivation."
There is a growing body of evidence that plants from the garlic or Allium family, which includes onions, leeks and chives, are effective cancer fighters, says Milner. The Penn State study, however, is the first to show that not all Allium foods are equal in their ability to retard the formation of cancer causing compounds.
The researchers found that water extracts of garlic, deodorized garlic powder and onions each blocked the ability of two chemicals, nitrite and morpholine, to link to form N-nitrosomorpholine, a known liver carcinogen. The leeks' blocking ability, on the other hand, was minimal.
Milner says, "Since deodorized garlic powder and garlic produced comparable results, the benefits cannot relate to odor causing constituents."
N-nitrosomorpholine is a member of the nitrosamine family of chemicals, many of which are potent carcinogens. Most nitrosamines are produced naturally in the body from nitrates and nitrites in water and foods.
"Since garlic and onions can block the formation of N-nitrosomorpholine, it is likely it will reduce the formation of other nitrosamines, " Milner says.
The Penn State researchers also found that a water soluble, sulfur-containing compound found in processed garlic, called S-allyl cysteine, also depressed the formation of the carcinogen. In addition, the sulfur compound reduced N-nitrosomorpholine's ability to alter DNA, the genetic material present in cells.
Milner says, "The benefits of eating garlic and onions is more than a blocking of nitrosamine formation but is also due to blocking their subsequent metabolism."
"Well over 90 percent of nitrosamines are considered carcinogens," Milner noted, "anything you can do to counteract their effect should be important in reducing cancer risk." The study was supported, in part, with grants from the American Institute of Cancer Research and Wakunaga of America Co., Ltd.
Milner's co-authors are Mark E. Dion, who earned his master's degree at Penn State, and Melanie Agler, a Penn State undergraduate.
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EDITORS: Dr. Milner can be contacted at (814) 865-0108 or jam14@psu.edu on the Internet.
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For other Penn State news, please visit our Home Page on the Web at: http://www.psu.edu/ur/
Also browse this release at EurekAlert!, a comprehensive news server for up-to-date research in science, medicine,and engineering at http://www.eurekalert.org/
WHY CAN'T YOU EAT GARLIC??????????
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2006-08-09 03:20:30
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answer #3
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answered by Anonymous
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highly processed meats, like hot dogs, lunch meats, bologna, bacon.
if you buy your meat uncooked at the butcher counter, you should be fine. but pre-packaged pre-cooked meats are not.
2006-08-09 03:08:23
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answer #5
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answered by Kutekymmee 6
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