Navigation Links
Vitamins Fail to Prevent Cancer: Study
Date:12/30/2008

C, E and beta carotene didn't halt women's risk of developing disease

TUESDAY, Dec. 30 (HealthDay News) -- In another blow to the supposed cancer-fighting powers of vitamins C and E, new research suggests that supplement forms of the vitamins don't prevent the disease in women.

And another widely touted supplement, beta carotene, didn't help either, the new study found.

"Simply taking antioxidant supplements is insufficient to prevent cancer development," said study lead author Jennifer Lin, an assistant professor of medicine at Harvard Medical School.

But it's still a good idea to eat plenty of fruits and vegetables that are rich in nutrients such as antioxidants, Lin said.

Vitamin supplements have taken hits in a number of studies in recent years, with some research suggesting that supplements such as vitamins B, C, D, E, folic acid and calcium don't prevent cancer when taken in combinations or alone. The findings contradict other studies that had suggested the vitamins may have a protective effect due to antioxidants, which reduce damage to cells in the body.

For the new study, the researchers looked at a group of 8,171 women who were randomly assigned to take a supplement, a combination of supplements or a placebo. The supplements were vitamin C (500 milligrams a day), vitamin E (600 International Units every other day) and beta carotene (50 milligrams every other day).

The women, all over the age of 40, took part in the study from 1995 and 1996 until 2005, for an average of nine years. They all had cardiovascular disease or were at risk for it.

A total of 624 of the women developed cancer, and 176 died from it during the period of the study. The researchers didn't find any "statistically significant" evidence that the supplements either helped or hurt a woman's risk of developing cancer.

The findings were published online Dec. 30 in the Journal of the National Cancer Institute.

Why didn't the supplements prevent cancer, as some earlier research had suggested? One theory, Lin said, is that they might be effective in people who are poorly nourished, but not in well-nourished people such as the women in the study. She said some research has shown that diets lacking in antioxidants -- found in fruits and vegetables -- can lead to higher cancer rates.

The study isn't the final word, Lin said. "More studies need to be done to see who may benefit from antioxidant supplements. One trial study has suggested that men, compared with women, were more likely to gain benefits from supplementation with antioxidants in reducing cancer risk. However, such findings need verification."

Dr. Demetrius Albanes, senior investigator with the U.S. National Cancer Institute, who wrote a commentary accompanying the study, acknowledged that while the study results were disappointing, it's possible that the supplements could have had positive effects in women who weren't at high risk for cardiovascular disease, as were those in the study.

He added that the study indicated that vitamin E may have some benefit at preventing colon cancer specifically, as other research has suggested.

In the big picture, Albanes said, research shows that lower-calorie diets with plenty of fruits and vegetables do have benefits. "But right now, the issue of vitamin supplementation is still very much up in the air for men and for women," he added.

More information

Learn more about the links between diet, exercise and cancer risk from the American Cancer Society.



SOURCES: Jennifer Lin, Ph.D., assistant professor of medicine, Brigham and Women's Hospital and Harvard Medical School, Boston; Demetrius Albanes, M.D., senior investigator, U.S. National Cancer Institute, Bethesda, Md.; Dec. 30, 2008, Journal of the National Cancer Institute, online


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Selenium, Vitamins E and C Wont Prevent Prostate Cancer
2. Changing Times Vitamins to Sponsor Emmanuel Manny Pacquiao in Upcoming Fight With Oscar De La Hoya.
3. ClutchWave LLC Launches PricePlow.com: Price Shopping For Supplements and Vitamins
4. King Features Syndicate and Changing Times Vitamins Sign Licensing Agreement for Popeye(R) the Sailor Man in the Water Drink Category.
5. Two Antioxidant Vitamins Dont Protect Against Heart Disease
6. Can Vitamins and Minerals Prevent Hearing Loss?
7. Can vitamins and minerals prevent hearing loss?
8. Vitamins E and C supplements not effective for prevention of cardiovascular disease in men
9. Folic acid, B vitamins do not appear to affect cancer risk
10. Folic Acid and Other B Vitamins Wont Help Prevent Cancer
11. Meijer Pharmacies to Offer Free Pre-Natal Vitamins
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/26/2017)... ... February 26, 2017 , ... This is an ... world’s first to be ISO/IEC 17025:2005 INAB accredited for Der p 1 (house ... is the globally recognised standard that sets out requirements for the technical competence ...
(Date:2/26/2017)... Park, KS (PRWEB) , ... ... ... of StaffBridge sets a new technology standard in staffing, scheduling, and reporting ... manage, monitor, and predict activity throughout the entire staffing process. StaffBridge technology ...
(Date:2/25/2017)... (PRWEB) , ... February 25, 2017 , ... FCPX users ... Color tools from Pixel Film Studios. With ProSharpen Color users have total control over ... easily refine their color range. With color spectrum tools users can visually see the ...
(Date:2/24/2017)... NJ (PRWEB) , ... February 24, 2017 , ... ... that provides business development, education, networking and recognition opportunities as well as advocacy ... Bell Works in Holmdel, NJ on February 23. The Council's Innovation Forecast ...
(Date:2/24/2017)... ... February 24, 2017 , ... In the Health Care ... a top priority because it’s not if you will be attacked, but when.” However, ... it comes to digital health care. , Improvements in auditing and monitoring have taken ...
Breaking Medicine News(10 mins):
(Date:2/24/2017)... Research and Markets has announced the addition of the "Hemophilia ... ... Drugs Price Analysis and Strategies - 2016, provides drug pricing data and ... questions: What are the key drugs marketed ... Global Hemophilia market? What are the unit prices and ...
(Date:2/24/2017)... , Feb. 24, 2017 Juan ... & Associates PC , a boutique securities firm headquartered ... York City , announces that a class action ... Massachusetts  against Inotek Pharmaceuticals Corporation (NASDAQ: ... the Company,s securities between July 23, 2015 and December 30, ...
(Date:2/24/2017)... Feb. 23, 2017  Directors from Pharma To Market Pty Ltd ... joined forces, resulting in the founding of Pharma To Market Pte ... To Market are pleased to announce their expansion into ... Singapore . The company are delighted to appoint ... the Singapore based entity. Joelle brings with ...
Breaking Medicine Technology: