Navigation Links
Antioxidants do not prevent degenerative eye disease

A diet rich in antioxidant vitamins and minerals does not seem to prevent the degenerative eye disease known as age related macular degeneration, finds a study published on today.

Age related macular degeneration is the leading cause of visual loss in older people. It is caused by the progressive break down of light sensitive cells in the macula, located in the centre of the retina at the back of the eye. Sufferers do not go blind, but find it virtually impossible to read, drive, or do tasks requiring fine, sharp, central vision.

Risk increases with age and smokers are thought to be more susceptible.

Antioxidants (such as vitamin C, vitamin E, various types of carotenoids, and zinc) are thought to reduce oxidative damage to the retina. But the evidence to support the role of dietary antioxidants in preventing macular degeneration remains unclear.

So researchers at the Centre for Eye Research Australia, the University of Melbourne analysed the evidence to examine the role of dietary antioxidants or dietary supplements in the primary prevention of age related macular degeneration.

They identified 11 studies (seven prospective studies and three randomised controlled trials) involving 149,203 people. A range of common dietary antioxidants were investigated and all the studies were carried out amongst well nourished Western populations with an average follow-up period of nine years.

Importantly, all the studies adjusted for age and smoking in their analyses.

The antioxidants investigated differed across studies, but when results were pooled they showed that vitamin A, vitamin C, vitamin E, zinc, lutein, zeaxanthin, α- carotene, β-carotene, β-cryptoxanthin and lycopene have little or no effect in the primary prevention of early age-related macular degeneration.

None of the three trials found antioxidant supplements to be protective in the primary prevention of early age related macular degeneration.

Despite some study limitations, the authors conclude that there is insufficient evidence to support the role of dietary antioxidants, including the use of dietary antioxidant supplements, for the primary prevention of early age-related macular degeneration.

Currently, cigarette smoking remains the only widely accepted modifiable risk factor for the primary prevention of early age-related macular degeneration, and patients seeking advice on this condition should be encouraged to quit, they add.

An accompanying editorial by Jennifer Evans at the International Centre for Eye Health supports these findings and says that reducing the prevalence of smoking is probably the most effective method of reducing the population burden of this common cause of visual loss in older people.

Contact: Emma Dickinson
BMJ-British Medical Journal

Related medicine news :

1. Antioxidants protect health tissue in people undergoing radiation therapy.
2. Antioxidants found in chocolates
3. Antioxidants used for longevity
4. Herbs: rich soure of antioxidants
5. Herbs: rich soure of antioxidants
6. Antioxidants found in chocolates
7. Sweet corn releases antioxidants on cooking
8. The Use Of Antioxidants To Diminish Effects of Alcohol During Pregnancy Questioned
9. Commercial grape juices and vinegars found rich in antioxidants
10. Antioxidants in the body protects the airways from diesel exhaust effect
11. Fruit And Vegetable Peels Are Rich Source Of Potent Antioxidants
Post Your Comments:
(Date:11/27/2015)... , ... November 27, 2015 , ... According to an ... recent 2015 American Dental Association meeting in Washington D.C. revolved around the fact that ... patient’s overall health. The talk stressed the link between periodontal disease (more commonly referred ...
(Date:11/27/2015)... , ... November 27, 2015 , ... ... the health care in America. As people age, more care is needed, especially ... are rising, and medical professionals are being overworked. The forgotten part of this ...
(Date:11/27/2015)... ... November 27, 2015 , ... ... toilets were," said an inventor from Hillside, N.J. "Many people catch diseases simply ... so that individuals will always be protected from germs." , He developed the ...
(Date:11/27/2015)... ... 27, 2015 , ... ProSidebar: Fashion is a set of 30 ... ProSidebar: Fasion, video editors can easily add an informative sidebar to any FCPX production. ... Utilize presets featuring self-animating drop zones, lines, bars, and text with the ease of ...
(Date:11/27/2015)... ... November 27, 2015 , ... Intellitec ... Dynamics SL User Group (MSDSLUG). Recognized as Microsoft’s official group for end users ... Dynamics SL software users, partners, industry experts and representatives. Intellitec Solutions’ membership status ...
Breaking Medicine News(10 mins):
(Date:11/27/2015)... 26, 2015 ... the "2016 Global Tumor Marker Testing ... and Sales Segment Forecasts, Innovative Technologies, Instrumentation ... to their offering. --> ... "2016 Global Tumor Marker Testing Market: ...
(Date:11/26/2015)... UTRECHT , Nederland, November 26, 2015 ... --> Een nieuwe aanpak combineert ... van gevorderde kanker. ... -->      (Photo: ... van het Leids Universitair Medisch Centrum (LUMC) ...
(Date:11/26/2015)... DUBLIN , November 26, 2015 /PRNewswire/ ... the addition of the "2016 Future ... Drugs of Abuse Testing Market: Supplier Shares, ... report to their offering. --> ... of the "2016 Future Horizons and ...
Breaking Medicine Technology: