拙作「極品調味料魚露與蠔油 癌症的無形殺手」的補充
(2009-11-13 19:38:46)
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筆者在11月13日寫了一篇「極品調味料魚露與蠔油 癌症的無形殺手」文章,結果有讀者認為有異義,
認為
1)這篇文章的邏輯有點兒亂,例如說廣東的癌症發病率不斷上升,如果元凶是魚露蠔油
2)還有就是越南魚露的消耗量世界之最,癌症似乎並沒有成正比的上升趨勢
謝謝各位的評論,筆者想在此補充一下。
1)廣東的癌症發病率不斷上升,如果元凶是魚露蠔油
據「中國腫瘤網」家庭醫生在線介紹,廣東惡性腫瘤的發病率不斷上升,目前最常見的惡性腫瘤仍是鼻咽癌。而據美國癌症中心支持進行全球食物與癌症關係的流行病學調查顯示,黴香鹹魚中所含的黴菌致癌物加上天氣潮濕、抽煙是“廣東瘤”即鼻咽癌高發原因;由於醃製食物中的所含的亞硝酸氨易引發食管癌、胃癌,有喜食醃製食物、魚露這類飲食習慣的廣東潮汕地區,尤其是南澳島附近則是食管癌、胃癌的高發區;
其中就證實了醃製食物包括魚露與惡性腫瘤仍是鼻咽癌的關聯。
據介紹,醃魚食品會誘發鼻咽癌鼻咽癌最高發病地區首推中國南方的廣東等省。那裏每十萬人中就會出現50例鼻咽癌患者。最近,來自香港的研究信息表明:南方人偏愛的醃魚食品是誘發鼻咽癌的主要因素之一。
為了弄清這種食物與鼻咽癌的關係,研究人員對24名在25歲以前就被診斷為鼻咽癌的患者進行了考察,專門分析了他們童年時代的食物,結果發現當這些病人還是幼兒時,醃魚就是他們最常吃的食物,而且在嬰兒時期,父母給他添加的唯一食物也是醃魚。這些病人以往很少吃新鮮蔬菜和水果。?
近期的研究發現,無論是烹製還是未燒的醃魚中都含有一種亞硝胺的化學物質,動物實驗證實它是一種強烈致癌物。
魚露又名魚醬油,福建稱魚油,是各種小雜魚和小蝦加鹽醃製加上蛋白酶和利用魚體內的有關酶及各種耐鹽細菌發酵,使魚體蛋白質水解,經過曬煉溶化、過濾、再曬煉,去除魚腥味,再過濾,加熱滅菌而成。就是一種醃魚食品,味道鮮美,是可作醬油用的調味品,產於福建、廣東等地。除當地食用外,產品大部外銷東南亞各國。
雖然醃魚與鼻咽癌的關聯尚待進一步探索,但是鑒於該食物中確實含有大量亞硝胺的事實,因而有必要對此引起關注。
2)還有就是越南魚露的消耗量世界之最,癌症似乎並沒有成正比的上升趨勢
越南人每年大約3.3億升魚露,人均3~4升。所以筆者推斷越南人在惡性腫瘤仍是鼻咽癌方麵一定無法逃此厄運,據聯合國文獻資料顯示,越南人的鼻咽癌,與世界其他國家相比,發病率,越南是最高的國家之一。
Estein - Barr virus (EBV) and cancer of nasopharynx:
Among reasons for nasopharynx cancer, EBV is considered as the most
important reason. This virus has been separated in tumours of nasopharynx
cancer. Besides, EBV is also one of the main reasons for malignant
lymphomas.
Nasopharynx cancer is the most popular disease among cancers in the
area of head, face and neck. Vietnam is one of countries with highest rate
of this disease in comparison with other countries in the world. Every year, an average of 250 - 300 new patients with nasopharynx cancer who are treated at the National Cancer Institute.
Initial signals of this disease are headache, buzzing in ears, stuffy a
half. These signals are easy to be thought as some therapeutic and nervous
diseases. However, the difference here is all these symptoms happen in only one side (left or right) and increase gradually; normal anti-inflammation and pain relief methods are useless for patients with this disease. If the patient is in the initial period of the disease, it\'s very effective and cheap to treat. Therefore, if detecting those symptoms, you should have your health examined and treated promptly at special basis of tumours.
同時,據越南新聞資料顯示,也認識到了常食魚露會引起鼻咽癌,甲狀腺癌和胃癌的風險增加。
Abstract
Previous studies have suggested that fermented fish sauce is related to an
increased risk for nasopharyngeal, thyroid and gastric cancers and has
suspicious carcinogenic and promoting effects in the laboratory, but these
reports have not investigated the association between this agent and
esophageal cancer in population.
It is concluded that risks of esophageal cancer in the population
were substantially associated with fermented fish sauce. Further
epidemiologic and experimental study are required to find a biologic causal relationship between them.
所以,結論是常食魚露會引起最常見的惡性腫瘤仍是鼻咽癌,食管癌與胃癌;
越南人因為食用魚露的量世界上為第一,所以越南人的的鼻咽癌,與世界其他國家相比其發病率,越南是最高的國家之一。
至於蠔油與致癌的關係,筆者隻是引述網上的文章,這裏就不作詳細的說明了,請原諒。