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Leafy greens and beetroot could help prevent age-related eye disease

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New research has found that eating leafy green vegetables may help reduce the risk of developing the eye disease AMD. (AFP pic)

AFP Relaxnews

New Australian research has found that a diet rich in vegetable nitrates, particularly leafy greens and beetroot, may help reduce the risk of developing early-stage age-related macular degeneration (AMD).

Carried out by researchers at the Westmead Institute for Medical Research, the new study set out to assess the relationship between dietary nitrate, found predominantly in green leafy vegetables and beetroot, and AMD.

When consumed these dietary nitrates are converted to nitric oxide, with under- or overproduction of nitric oxide linked to several eye diseases. However, the potential effect of dietary nitrates on the risk of AMD had not been investigated.

For the new research the team interviewed 2,037 participants over the age 49 about their diet and followed them over a 15-year period.

The findings, published in the Journal of the Academy of Nutrition and Dietetics, showed that after adjusting for factors such as age, sex, smoking status and fish intake, participants who ate between 100 to 142 mgs of vegetable nitrates each day had a 35% lower risk of developing early AMD than people who ate less than 69mgs of vegetable nitrates each day.

To put this into context, spinach has approximately 20mg of nitrate per 100g, while beetroot has nearly 15mg of nitrate per 100g.

However, the research did not show any additional benefits for people who ate more than 142mgs of dietary nitrate each day.

The researchers also failed to find any significant associations between vegetable nitrates and late stage AMD, or between non-vegetable nitrates and AMD risk.

“This is the first time the effects of dietary nitrates on macular degeneration risk has been measured,” commented lead researcher Associate Professor Bamini Gopinath. “If our findings are confirmed, incorporating a range of foods rich in dietary nitrates — like green leafy vegetables and beetroot — could be a simple strategy to reduce the risk of early macular degeneration.”

AMD is a degenerative eye disease which causes loss of central vision, affecting everyday abilities such as seeing faces, driving, reading, and writing. Age is the strongest known risk factor and the disease is more likely to occur after the age of 50, with one in seven Australians over 50 showing some signs of macular degeneration. There is currently no known cure.

Research published earlier this month also found that following the popular Mediterranean diet may also reduce the risk of developing AMD. After looking at nearly 5,000 participants researchers at the Université de Bordeaux, France, and Erasmus University Medical Center, The Netherlands, found that those who closely followed the Mediterranean diet were 41% less likely to develop AMD compared with those who did not follow the diet. Previous research has also suggested that the Mediterranean diet, which encourages a high intake of fruit, vegetables, fish, pulses, olive oil and whole grains, and a low intake of meat, processed foods, and dairy products, is beneficial for both those already have AMD or are at risk of developing it.

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Lifestyle - U.S. Daily News: Leafy greens and beetroot could help prevent age-related eye disease
Leafy greens and beetroot could help prevent age-related eye disease
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