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Intake of Green Leafy and Nitrate-Rich Vegetables Lessens Risk of Glaucoma

by Dr. Trupti Shirole on January 17, 2016 at 12:12 PM
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 Intake of Green Leafy and Nitrate-Rich Vegetables Lessens Risk of Glaucoma

Glaucoma is a condition which can affect sight, usually due to build up of pressure within the eye because fluid cannot drain away. A recent study says that leafy vegetables such as lettuce, spinach and kale and nitrate-rich vegetables are associated with lowering the risk of primary open-angle glaucoma by 20-30%.

This new study found people who ate a nitrate-rich diet had lower levels of primary open-angle glaucoma (POAG), a rare condition which involves chronic or acute sudden painful build-up of pressure in the eye. The researchers followed up participants biennially in the prospective cohorts of the Nurses' Health Study (63,893 women; 1984-2012) and the Health Professionals Follow-up Study (41,094 men; 1986-2012).

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Eligible participants were 40 years or older, were free of POAG, and reported eye examinations. Information on diet was updated with questionnaires. During follow-up, 1,483 incident cases of POAG were identified. Participants were divided into quintiles (one of five groups) of dietary nitrate intake (quintile 5, approximately 240 mg/d; quintile 1, approximately 80 mg/d).

The researchers found that greater intake of dietary nitrate and green leafy vegetables was associated with a 20-30% lower POAG risk; the association was particularly strong (40-50% lower risk) for POAG with early paracentral visual field loss (a subtype of POAG linked to dysfunction in blood flow autoregulation).

The study has been published in JAMA Ophthalmology.

Source: ANI
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