Food taboos are the favorite topic of Weibo. After the reprinted fermentation, the original argument that there is no scientific basis often causes panic. Recently, the protagonist of this topic has become ham and yogurt.
Some people publish on the Internet. Both of these foods can cause carcinogens at the same time. In this regard, Fan Zhihong, an associate professor of nutrition and food safety at the Food College of China Agricultural University, rumored in his blog that “Ham and yoghurt are related to eating and causing cancer†is not true from a nutrition perspective.
About this rumors, the most popular version on the Internet is "Because ham and pickled products contain nitrates, they can be reduced to nitrites under the action of lactic acid bacteria and catalyzed by thiocyanate in saliva. It may cause cancer of the digestive organs such as the gastrointestinal tract and the liver. Therefore, you should not drink lactic acid beverages for one hour before and after eating foods containing nitrates."
Fan Zhihong, an associate professor at the Department of Nutrition and Food Safety at the Food College of China Agricultural University, said that after hearing this, “the first feeling is dizziness.†“There are so many scientific mistakes, and it's really hard to be the sponsor of this taboo.†Fan Zhihong pointed out that there are several serious scientific mistakes in this news.
Error one: nitrite in ham is produced by the reduction of lactic acid bacteria
Experts Say: Pickled meats have nitrites themselves and no lactic acid bacteria "help"
First of all, ham and salted products are usually added during the production of sodium nitrite, even if the addition of sodium nitrate, but also naturally degrade into sodium nitrite to play a role. Most of the sodium nitrite continues to decompose to produce nitric oxide, which is very easy to combine with the red pigment in the meat, that is, heme, so that the red heme becomes "nitrogen oxide heme." Nitric oxide heme can ensure that the meat does not change color under heating conditions. Therefore, when making ham, sausage, and other meat pickled products, there is no need for lactic acid bacteria to help form nitrite.
Mistake 2: Lactic acid bacteria have the ability to reduce nitrates in ham
Experts Say: Reducing Nitrate - Lactic Acid Bacteria Cannot Complete Mission
Fan Zhihong pointed out that lactic acid bacteria do not have nitrate reductase and they cannot convert nitrate into nitrite. "So, letting lactic acid bacteria go into the meat to help turn nitrate into nitrite is really a task that lactic bacteria cannot accomplish unless they pollute a lot of germs. Retreating, say, assume that lactic acid bacteria can really handle nitrates. It turns into nitrite and enters the stomach and is immediately killed by stomach acid, which is the peak of gastric acid secretion in the meal. The pH of the stomach is as low as 3 or less, which is much higher than the acidity of yogurt. It is impossible for lactic acid bacteria to survive in large numbers.
Mistake 3: Amines and nitrites in yogurt combine to form carcinogen nitrosamines
Experts say: The content of amines in yogurt is extremely low, synthetic nitrosamines can not help
There is another saying on the Internet that "yogurt contains amines, and meat contains nitrites, which combine into carcinogenic nitrosamines in the stomach."
Fan Zhihong said that in fact, the content of protein in yogurt is even less than 3%, and the content of amines is even lower; while the protein content in lean meat is as high as nearly 20%, and amines do not know much more than yogurt. In other words, two major raw materials for the synthesis of carcinogens are already available in cured meat products, and trace nitrosamine carcinogens can be synthesized during salting and storage. It does not require "amines in yogurt" to help.
Mistake 4: Yogurt can cause cancer within one hour of eating
Experts say: No experiment confirms this conclusion, yogurt can help prevent cancer
Fan Zhihong said that at present, both animal experiments and in vitro experiments have confirmed that yogurt and lactic acid bacteria extracts have inhibitory effects on the carcinogenic effects of various carcinogens and have reduced effects on DNA damage caused by carcinogens. It has not been seen that studies have confirmed that eating yogurt within one hour before and after eating has a positive effect on the occurrence of cancer. "You don't have to panic before and after eating yoghurt. It's a great pity that yoghurt, a nutritious and potentially beneficial food for preventing cancer, has become a dangerous food for many taboos. It makes people frustrated when they drink yoghurt."
Fresh Half Shell Mussel Meat,Half Shell Mussel Meat,Frozen Cooked Mussel Meat,Frozen Mussel
Shengsi Huali Aquatic Products Co.,Ltd , https://www.mytilus-edulis.com