久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

Supplements may exacerbate cancer, say HKU researchers

Updated: 2016-02-19 09:16

By Timothy Chui in Hong Kong(HK Edition)

  Print Mail Large Medium  Small 分享按鈕 0

Self-medicating with antioxidants could boost tumor cells, studies show

When it comes to cancer, special care must be taken when self-medicating with antioxidants, according to a University of Hong Kong (HKU) research team.

Director of State Key Laboratory for Liver Research (HKU) Irene Ng Oi-lin said cancer patients should take note that a high intake of antioxidant supplements might not be beneficial to people's health.

Taking antioxidants was a balancing act, Ng said, noting cancer cells could be repaired with proper vitamins. But dousing them with antioxidants stimulated responses where test tumor cells actually benefited from an environment of excessive antioxidants.

Similar risks existed for colorectal, rectal, bladder, gastric, ovarian, lung and prostate cancers, Ng said.

She said the average person only needed about 40 mg to 120 mg of Vitamin C daily, from newborns to breastfeeding mothers. Antioxidant supplements such as Vitamin C pills are available over the counter in 1 gram single doses.

For Vitamin C, 100 grams of a regular orange is sufficient to fulfill 64 percent of the body's daily recommended intake. But this only provides 1 percent of the body's daily recommended intake of Vitamin A, according to the United States Department of Agriculture (USDA).

"It might only be half true that antioxidants are beneficial to health, as cancer cells also need a lot of antioxidants," assistant professor at HKU's Department of Pathology, Carmen Wong Chak-Lui, said.

In tested cancer cells, Ng's team found an enzyme called transketolase interacted with antioxidants to speed growth, while test batches where the enzyme was suppressed were up to 40 percent smaller.

Liver cancer is the third-most common cancer-related cause of death in Hong Kong, after lung and colorectal cancer, according to Hong Kong Cancer Registry figures.

The majority of liver cancer patients are aged over 40, with 80 percent being carriers of hepatitis B, Ng said.

The anti-cancer effects of antioxidant-loaded fruit juices have been an important marketing point for decades. A multibillion-dollar international market has been built on supplements.

tim@chinadailyhk.com

Supplements may exacerbate cancer, say HKU researchers

Supplements may exacerbate cancer, say HKU researchers

(HK Edition 02/19/2016 page8)

主站蜘蛛池模板: 午夜国产理论 | 欧美一做特黄毛片 | 精品一区二区三区在线成人 | 国产成人禁片免费观看视频 | 一本到不卡 | 久久久久久久久久久久久久久久久久 | 国产男女爽爽爽免费视频 | 一区二区三区在线观看免费 | 欧美xxxx精品另类 | 国内自拍区 | 国产精品久久久久亚洲 | 欧美刺激午夜性久久久久久久 | 在线观看免费av网站 | 欧美成年免费a级 | 成在线人免费视频 | 在线观看欧美亚洲日本专区 | 欧美亚洲一区二区三区四 | 久久黄色精品视频 | 91pao强力打造免费高清 | 久草青青视频 | 最新欧美一级视频 | 久久久久久免费精品视频 | 香蕉成人在线 | 色拍自拍亚洲综合在线 | 精品欧美高清不卡在线 | 亚洲小视频| 精品久久久久久亚洲 | 国产免费一区二区三区在线 | 国产在线一区在线视频 | 98国内自拍在线视频 | 欧美亚洲不卡 | 毛片手机在线 | 全部在线播放免费毛片 | 在线国产观看 | 日韩一级特黄毛片在线看 | 色婷婷激婷婷深爱五月老司机 | 亚洲福利精品一区二区三区 | 亚洲性久久久影院 | 欧美视频www | 国产粉嫩高中生无套第一次 | 亚欧美图片自偷自拍另类 |