Aside from weight loss, limiting consumption of carbohydrates holds many profound health benefits. For example, it seems early cortical cataracts, the second most common kind that occurs in the cortex of the lens of the eye, are spurred by the quantity of carbohydrates one consumes, not the quality.
Three principal forms of age-related cataracts exist: Nuclear and cortical opacities affect the center and adjacent peripheral tissue of the lens, respectively, while posterior subcapsular (PSC) opacities affect the posterior aspect of the lens.
And while few published human studies have evaluated associations between carbohydrates and lens opacification, one study set out to test the hypothesis that long-term carbohydrate intake and dietary glycemic index are linked to the odds of early lens opacities.
Quantity, Not Quality
The study involved 417 middle-aged female patients; dietary data was based on an average of semiquantitative food-frequency questionnaires collected over a time span of 14 years. (Opacities were assessed by using the Lens Opacity Classification System III.) Based on the information collected, researchers found:
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Those who ate the most carbs were almost 2.5 times more likely to suffer from cortical cataracts.
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High carb intake was not associated with nuclear cataracts -- the most common kind of cataract.
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Dietary glycemic index did not relate to risk of either cortical or nuclear opacity.
Moreover, during the course of the study -- in which the average patient was about age 60 and had a body mass index of 24 -- scientists found the daily intake of more than 200 grams of carbohydrates nearly doubled a woman's risk of cortical cataracts.
American Journal of Clinical Nutrition June 2005;81(6):1411-141
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