Featured Research

from universities, journals, and other organizations

First Study Of Combined Dietary Factors Finds Reduced AMD Risks

Date:
May 9, 2009
Source:
American Academy of Ophthalmology
Summary:
A diet that includes key nutrients and low-glycemic index foods is likely to reduce risks for age-related macular degeneration (AMD), according to the first study to analyze these factors in combination.

A diet that includes key nutrients and low-glycemic index foods is likely to reduce risks for age-related macular degeneration (AMD), according to the first study to analyze these factors in combination. Chung-Jung Chiu, PhD, of the Laboratory for Nutrition and Vision Research, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, led this new analysis of Age-Related Eye Disease Study (AREDS) data.

The study team included AREDS researchers and was funded in part by the United States Department of Agriculture (USDA) and the National Institutes of Health (NIH). Earlier studies—including AREDS and the Nutrition and Vision Project of the Nurses’ Health Study—had revealed the AMD-protective effects of several nutrients and of a low-glycemic index (GI) diet, but Chiu’s study is the first to associate specific food intake patterns with substantial AMD risk reductions.

Study participants whose diets included higher levels of protective nutrients and of low-GI foods were at lowest risk for early and advanced AMD. This eye disease affects the retina, the sensitive tissue at the back of the eye that transmits images to the brain; advanced AMD can destroy the detailed, central vision people need to read, drive, and enjoy daily life. Data was analyzed for 4,003 AREDS participants, involving 7,934 eyes. Levels of AMD-protective nutrients, including vitamins C and E, zinc, lutein, zeaxanthin, omega-3 fatty acids (DHA and EPA), as well as low-GI foods, were assessed using participants’ food intake reports. (A food’s GI value is based on how fast its carbohydrates raise the body’s blood sugar levels; low GI foods have less impact on blood sugar fluctuations.) Each dietary factor was assigned a percentile score, and factor scores were added up to find each participant’s compound score. Compound scores were related to participants’ AMD risk, based on diagnostic eye photographs taken when they joined AREDS. Beta-carotene, assessed in this and earlier studies, did not affect risk levels in this analysis.

“Although the compound score may be a useful new tool for assessing nutrients in relation to AMD, specific dietary recommendations should be made only after our results are confirmed by clinical trials or prospective studies,” Dr. Chiu said.

AMD research is intensifying because the most susceptible population, people over age 60, is growing. A new report estimates 18 million will have AMD by 2050, 1.6 million of whom will be legally blind. Advanced AMD, especially the most prevalent “dry” form (geography atrophy), is a leading cause of severe vision impairment, and treatment options are limited. Preventing AMD and delaying disease progression would best preserve people’s quality of life while containing healthcare system cost and care challenges. Food sources of nutrients that support good general and eye health include: citrus fruits, vegetable oils, nuts, whole grains, dark green leafy vegetables, and cold water fish.

This research was published in the May issue of Ophthalmology, the journal of the American Academy of Ophthalmology.


Story Source:

The above story is based on materials provided by American Academy of Ophthalmology. Note: Materials may be edited for content and length.


Cite This Page:

American Academy of Ophthalmology. "First Study Of Combined Dietary Factors Finds Reduced AMD Risks." ScienceDaily. ScienceDaily, 9 May 2009. <www.sciencedaily.com/releases/2009/05/090501123334.htm>.
American Academy of Ophthalmology. (2009, May 9). First Study Of Combined Dietary Factors Finds Reduced AMD Risks. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2009/05/090501123334.htm
American Academy of Ophthalmology. "First Study Of Combined Dietary Factors Finds Reduced AMD Risks." ScienceDaily. www.sciencedaily.com/releases/2009/05/090501123334.htm (accessed August 20, 2014).

Share This




More Health & Medicine News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Possible Ebola Patient in Isolation at California Hospital

Possible Ebola Patient in Isolation at California Hospital

Reuters - US Online Video (Aug. 20, 2014) — A patient who may have been exposed to the Ebola virus is in isolation at the Kaiser Permanente South Sacramento Medical Center. Linda So reports. Video provided by Reuters
Powered by NewsLook.com
Raw: World's Oldest Man Lives in Japan

Raw: World's Oldest Man Lives in Japan

AP (Aug. 20, 2014) — A 111-year-old Japanese was certified as the world's oldest man by Guinness World Records on Wednesday. Sakari Momoi, a native of Fukushima in northern Japan, was given a certificate at a hospital in Tokyo. (Aug. 20) Video provided by AP
Powered by NewsLook.com
Do More Wedding Guests Make A Happier Marriage?

Do More Wedding Guests Make A Happier Marriage?

Newsy (Aug. 20, 2014) — A new study found couples who had at least 150 guests at their weddings were more likely to report being happy in their marriages. Video provided by Newsy
Powered by NewsLook.com
Ebola-Hit Sierra Leone's Freetown a City on Edge

Ebola-Hit Sierra Leone's Freetown a City on Edge

AFP (Aug. 19, 2014) — Residents of Sierra Leone's capital voice their fears as the Ebola virus sweeps through west Africa. Duration: 00:56 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins