恐怖醫學 EP 紫菜，葉酸，大腸息肉 (Nori, Folic Acid and Intestinal Polyp)

恐怖醫學 Viu TV  2017-07-02

重點:

今集講到紫菜 (Nori) 含大量葉酸(Folic Acid)，當血液葉酸 > 8 ng / nl ，男士患大腸息肉(intestinal polyp)機會減20%, 女士患大腸息肉機會減50%,

不過，看來不難找到相反結論的醫學報告 (見下文參考部份)。有待研究。

This episode talks about
(1) high folic acid content in Nori.
(2) When serum folic acid concentration is above 8 ng / nl, the chances of getting intestinal polyp reduces by 20% for men, and reduce by 50% for women.

However, the evidence from medical papers is actually pretty contradictory (see references below).  Further research is needed.

參考部份:
References:

Folic acid doesn't cut risk of colon polyps: study (2012)

http://www.reuters.com/article/us-folicacid-idUSBRE89E00020121015

Folate and colorectal cancer prevention (2009)

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2634716/

A ‘dual-modulator' role for folate in colorectal carcinogenesis has been proposed in which moderate dietary increases initiated before the establishment of neoplastic foci have a protective influence, whereas excessive intake or increased intake once early lesions are established increases tumorigenesis. 

The adverse effects of an excessive folic acid intake  (Nature 2017)

http://www.nature.com/ejcn/journal/v71/n2/full/ejcn2016194a.html