Research on UK twins is first to show that diet, lifestyle may outweigh genetics when it comes to common eye condition
A diet rich in vitamin C could cut risk of cataract progression by a third, suggests a study being published online in Ophthalmology, the journal of the American Academy of Ophthalmology. The research is also the first to show that diet and lifestyle may play a greater role than genetics in cataract development and severity.
Cataracts occur naturally with age and cloud the eye’s lens, turning it opaque. Despite the advent of modern cataract removal surgery, cataracts remain the leading cause of blindness globally. Researchers at King’s College London looked at whether certain nutrients from food or supplements could help prevent cataract progression. They also tried to find out how much environmental factors such as diet mattered versus genetics.
The team examined data from more than 1,000 pairs of female twins from the United Kingdom. Participants answered a food questionnaire to track the intake of vitamin C and other nutrients, including vitamins A, B, D, E, copper, manganese and zinc. To measure the progression of cataracts, digital imaging was used to check the opacity of their lenses at around age 60. They performed a follow-up measurement on 324 pairs of the twins about 10 years later.
During the baseline measurement, diets rich in vitamin C were associated with a 20 percent risk reduction for cataract. After 10 years, researchers found that women who reported consuming more vitamin C-rich foods had a 33 percent risk reduction of cataract progression. Continue reading
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For most of us, summer is the perfect time to get fruits that are less than readily available out-of-season. And eating more fruit is a great way to increase your vitamin C intake.
Studies show that vitamin C is a powerful and effective antioxidant that offers a wide array of important health benefits, including:
- lowers blood pressure and stroke risk
- regulates nitric oxide levels
- improves peripheral blood flow
- aids in cellular repair
- strengthens immune system
- improves cardiac health
- helps avoid degenerative diseases
- improves eye health
To ensure that you get at least the recommended 90 mg per day, eat a 1 cup serving of a fruit salad made from any combination of oranges, strawberries, papaya, kiwi, and mango. If you have another favorite, toss it in there, too (I like watermelon — a good source of vitamin C and more lycopene than tomatoes). All these fruits are…
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A major review of the evidence has found that taking vitamin C supplements does not prevent people catching colds, and doesn’t cure them, either, although it might help your cold clear up slightly sooner.
What do we know already?
The common cold is a major cause of illness, and of time off work and school. It’s not usually serious, and it clears up by itself. But the symptoms can be unpleasant and exhausting.
There are about 200 viruses than can cause cold symptoms, and there isn’t much doctors can do about them. Antibiotics are useless against colds – antibiotics fight bacteria but can’t help against viruses. Over-the-counter treatments like paracetamol and decongestants can treat some of the symptoms, but they aren’t a cure.
Doctors have been looking at whether vitamin C helps prevent and treat colds for about 70 years, and studies have found different results. This review looked at…
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Just what we need to learn in cold season ….
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New research from Karolinska Institutet in Sweden shows that men who take vitamin C supplements regularly run a higher risk of developing kidney stones. The study, which is published in the scientific periodical JAMA Internal Medicine, did not however observe an increased risk between kidney stones and multivitamins – which contain lower concentrations of vitamin C.
The research is based on data from a large population-based study of men from Västmanland and Örebro counties, who were monitored for 11 years. A total of 23,355 men were identified who had no history of kidney stones and who took either no dietary supplements or supplements in the form of vitamin C only. During the study period, 436 of the participants developed kidney stones that required medical attention. The researchers then compared the risk of kidney stones in vitamin C-takers with that in men who did not take any supplements. The analysis was…
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