Navigation Links
New Data Reinforces Correlation Between Carbohydrate Quality and Loss of Vision

The quality of carbohydrates that a person eats may be directly correlated to Age-related macular degeneration (AMD) and its related loss of vision. This is according to a new study by Allen Taylor, PhD, director of the Laboratory for Nutrition and Vision Research at the Jean Mayer USDA Human Nutrition Research Center on Aging (USDA HNRCA) at Tufts University, and colleagues. They published their findings in the July issue of l the American Journal of Clinical Nutrition. These findings reinforce the earlier study linking dietary glycemic index with the risk of developing AMD.

"Men and women who consumed diets with a higher glycemic index than average for their gender and age-group were at greater risk of developing advanced AMD," corresponding author Taylor says. "The severity of AMD increased with increasing dietary glycemic index." Glycemic index is a scale applied to foods based on how quickly the carbohydrates in foods are converted to blood sugar, or glucose.

Foods like white rice, pasta and bread are examples of foods with a high-glycemic-index, meaning that these foods are associated with a faster rise and subsequent drop in blood sugar. Whole wheat versions of rice, pasta and bread are examples of foods that have a low-glycemic-index. These foods are often considered higher quality carbohydrates because they are associated with a slower and less dramatic rise and fall of blood sugar.

"Our results build upon findings from an earlier, smaller study in which we determined that consuming a diet with a high glycemic index, but not one with a high total amount of carbohydrate, increased the risk of developing early AMD," says first author Chung-Jung Chiu, DDS, PhD, scientist in the Laboratory for Nutrition and Vision Research at the HNRCA and an assistant professor at Tufts University School of Medicine.

In the current study, Taylor, Chiu, and colleagues analyzed data from 4,099 men and women participating i n the nationwide Age-Related Eye Disease Study (AREDS). Detailed dietary histories were obtained at the start of the study when participants were 55 to 80 years of age and had varying degrees of AMD. The AREDS was designed to assess the effect of high-dose antioxidant vitamins and zinc on the progression of AMD and cataracts, two of the leading causes of vision loss in older adults.

"Although carbohydrate quality was not the main focus in the AREDS, we were fortunate that the investigators had collected the dietary carbohydrate information we needed to do our analyses," says Taylor, who is also a professor at the Friedman School of Nutrition Science and Policy at Tufts and the Tufts University School of Medicine. "Our findings suggest that 20 percent of the cases of advanced AMD might have been prevented if those individuals had consumed a diet with a glycemic index below the average for their age and gender," notes Taylor.

AMD typically occurs after middle age, although the events which cause it may begin earlier. A leading cause of irreversible blindness, AMD results from the gradual breakdown of light-sensitive cells in the central region of the eye's retina, called the macula. Although there is no effective therapy for AMD, dietary intervention may delay its progress. Identifying modifiable risk factors for AMD is becoming increasingly important as the population ages. As Taylor and colleagues point out, the number of people in the US with visually impairing AMD is expected to double and reach three million by 2020.

"Our results support our hypothesis," says Taylor, "that dietary glycemic index, which has been related to the risk of diabetes, is also associated with the risk and severity of AMD." Taylor speculates that carbohydrates that comprise a high-glycemic-index diet may provide eye tissue"It is possible that the type of damage produced by poor quality carbohydrates on eye tissue is similar in both diabetic eye disea se and AMD."

Taylor and colleagues conclude that the risk for AMD may be diminished by improving dietary carbohydrate quality, as defined by dietary glycemic index. This may be achieved by relatively simple dietary alterations, such as replacing white bread with whole grain bread. "However," Taylor cautions, "additional studies are needed before we can recommend dietary carbohydrate management as a prevention strategy for AMD."


'"/>




Related medicine news :

1. New Study Reinforces Aspirins Effectiveness Against Heart Disease
2. Study Reinforces Safety of Long-term Biologic Treatment for Rheumatoid Arthritis
3. Correlation Between Bile Duct Obstruction and Ductal Cancer Found
4. Study Finds No Correlation Between Number of Pills and Adherence to It
5. Link Between Infection And Heart Disease
6. Prescription Drug Use Varies Widely Between States
7. Wait Between Pregnancies
8. Link Between Migraines and Behavioral Disorders
9. Link Between Obesity and Behavior in Kids
10. Link Between Mothers Depression and Violence in Children
11. Link Between Alcohol and Decrease in Brain Size
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/4/2016)... ... May 04, 2016 , ... The RIDER ... and development of DRACO broad-spectrum antiviral therapeutics. DRACOs have proven effective against all ... May 3, 2016 at http://igg.me/at/EndTheVirus and runs for 60 days, we ...
(Date:5/4/2016)... (PRWEB) , ... May 04, 2016 , ... Nike Rugby ... junior rugby in San Diego. Willis, founder of Elite Rugby Camps and current Nike ... and players every year since 2009. , “I’m excited for our eighth summer ...
(Date:5/4/2016)... (PRWEB) , ... May 04, 2016 , ... ... a master charity program created to assist the people of their local community. ... with nonprofit organizations and community leaders. Their hope is to bring awareness to ...
(Date:5/4/2016)... ... May 04, 2016 , ... Dr. Elyson and Dr. Assili, ... surgery at their office. Wisdom tooth removal, a common dental procedure, is performed for ... often are improperly erupted, resulting in risks of complications. By providing wisdom tooth removal ...
(Date:5/4/2016)... ... ... Francesca Loparco, Co-Founder of Queen City Dream Cars, an exotic car rental business ... at Christenbury Eye Center. The entrepreneur struggled with her computer, riding horses and driving ... her in-office consultation and eye exam. Francesca’s eyesight was restored to 20/20 in both ...
Breaking Medicine News(10 mins):
(Date:5/4/2016)... , May 4, 2016 ... addition of the  "Global Actinic Keratosis Market ... to their offering.       (Logo: ... Keratosis Market and Competitive Landscape Highlights 2016, ... products, Actinic Keratosis epidemiology, Actinic Keratosis market ...
(Date:5/3/2016)... Sino-German High-Tech Fund to further expand product development, strengthen its disease modeling capabilities and increase market presence. ... ... ... ... Sino-German High-Tech Fund ...
(Date:5/3/2016)... Ore. , May 3, 2016   BIOTRONIK ... importance of extending care beyond the implant at the ... May 4-7 in San Francisco . ... continually delivering the highest quality of patient care and ... are cared for each and every tomorrow," said ...
Breaking Medicine Technology: