和平曙光分享了政大動物之生 Life For Animals 的貼文。

7月10日 ·    awesome

【文章翻譯｜科學家發現，紅肉及乳製品有致癌風險！】

聖地牙哥加利福尼亞大學的新研究發現，吃紅肉會導致高度罹癌風險背後的主因為—糖。

當說到吃紅肉，只有人類會有高度的罹癌風險，其他的肉食動物在自然的情況下不會有健康方面的負面影響。這份2016/12/29在《美國國家科學院院刊》發佈的研究，發現了一種獨特的糖，名為Neu5Gc，在多數的哺乳動物身上可以發現，但在人類身上沒有。Neu5Gc會引起過敏反應，進而導致發炎。

領導此研究的Ajit Varki解釋Neu5Gc在小鼠身上的反應：「在這研究之前，所有的證據都指出Neu5Gc和癌症的關係僅是偶然，或是從某些人為的實驗裝置間接地預測而來。這是我們第一次直接展示：在精密地模擬人體內的情況下，對小鼠餵食非人造的Neu5Gc，並誘發抗Neu5Gc抗體，會增加小鼠身上自發性的癌症。」

此種特定的糖可以在紅肉、牛奶和某些起司中被發現（在營養的定義上，紅肉包含豬肉和其他家畜）。對人類而言，不幸的是，我們的身體在自然的情況下不能製造這種糖，因此當它被我們身體的組織吸收時，它就像是個外來的入侵者。這因此刺激了我們的免疫系統。

結果便是造成發炎。

然而，發炎本身並不是件好事，且會越來越嚴重。如果免疫系統很快地就受到Neu5Gc影響，將導致慢性的發炎，此發炎將因此導致癌症。經常吃紅肉的人肯定會比那些偶爾吃紅肉的人面臨更強烈的反應。

其他完全的肉食動物，可以製造Neu5Gc，因此可以吃紅肉，而非完全肉食動物的人類則不行。因此，很明顯的人類必須避免攝取紅肉，或是發炎及可能的癌症。至少，減少紅肉攝取將有益健康。

如果因為某些原因讓你相信每天吃紅肉不是件壞事（即使是草飼的紅肉 ），現在，你有了證據。抱歉，肉食者，人類不是天生的肉食動物！

#vegan #紅肉 #牛奶 #起司 #致癌
 

FOOD, DRINKS & NUTRITION, RECIPES

Scientist Finally Discover Why Eating Red Meat Causes Cancer

APRIL 19, 2017 by ADMIN 

A new study out of the University of California, San Diego has discovered the culprit behind why eating red meat leads to higher instances of cancer -and it all has to do with a sugar.

 

Humans are the only animals that have a higher risk of cancer when it comes to eating red meat, as other carnivores eat red meat naturally with no ill side effects. The study, which was published December 29 in the “Proceedings of the National Academy of Sciences,” discovered that a unique sugar named Neu5Gc, found in most mammals but not in humans, triggers an immune response that in turn causes inflammation.

 

Ajit Varki, who led the study, explained the effect Neu5Gc had in mice: “Until now, all of our evidence linking Neu5Gc to cancer was circumstantial or indirectly predicted from somewhat artificial experimental setups … This is the first time we have directly shown that mimicking the exact situation in humans – feeding non-human Neu5Gc and inducing anti-Neu5Gc antibodies -increases spontaneous cancers in mice.”

 

 red meat and cancer

This particular sugar can be found in red meats (using the nutritional definition of red meat, which includes pork and other livestock), cow’s milk and certain cheeses. Unfortunately for humans, our bodies can’t produce this sugar naturally, so when it is absorbed into our tissues, it is seen as a foreign invader. This then leads to the activation of our immune systems.

 

The result is inflammation.

 

And, while inflammation is not a great thing, in and of itself, it gets worse. If the immune system is subject to Neu5GC frequently, chronic inflammation will result. This inflammation can then lead to cancer. Those who regularly consume red meat will definitely suffer a stronger reaction than those who ingest red meat on an occasional basis.

 

Other animals, strict carnivores, who can make the Neu5GC sugar can eat red meats. Humans, not being strict carnivores, can’t. Therefore it seems clear that humans must avoid red meat consumption or face inflammation and possible cancer. At the minimum, reducing red meat ingestion will boost health.

 

If for some reason you believe eating red meat every day (even if it is grass-fed) isn’t a bad thing, well now you have proof. Sorry, meat eaters, humans just aren’t built to be true carnivores.

 

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