Drinking fruit juice or vegitable juice every other day, may keep Alzheimer's disease away.
A new study found that people who drank fruit and vegitable juices more than three times a week, were 76% less likely to develop Alzheimer's disease, that those who drank juice less than once a week.
Researches say the results suggest that a class of antioxidants found in fruit and vegitable juices, called polyphenols may have a protective effect, on the brain and help to fight dementia and Alzheimer's disease.
Polyphenols are found in fruits and vegitables, primarily, in the skins and peels, and are abundant in juices, teas, and wines. In the study published in the American Journal of Medicine researches followed nearly 2000 Japanese-American adults from King County, Washington for 10 years. The participants were aged 65 or older, and were free of any signs of Alzheimer's or dementia at the start of the study. Self-reported dietary information was obtained from 1,589 of the adults. The average of this group was 72 years at the time of the study.
Previous studies show Japanese adults living in Japan have a lower incidence of Alzheimer's disease. But, Japanese people living in the U.S. have a higher rate of the disease, which suggests that environmental factors, such as diet and lifestyle may play an important role in the development in the developing of Alzeimer's disease. After adjusting for possible confrounding factors, like smoking, educational status, and physical activity, the reaseachers found that people who drank fruit and vegtitable juices more than 3 times a week, had 76% lower risk of probable Alzheimer's disease, compared with those who drank juice less than once a week. Drinking fruit or vetitable juice once a week was associated with a 16% lower risk
In addition, the study showed the protective benefits of the juice appeared to be particularily enhanced for people who had a genetic marker linked to an increased risk of Alzeimer's disease known as apolipropiotein.
They also found no relationship between dietary intake of vitamins C and E, beta carotene, or tea and the risk for Alzheimer's disease. Researchers say these results are only preliminary and more study is needed to confirm the relationship between polyhenols and Alzheimer's disease. Other recent studies looking at diet and supplement use with risk for Alzheimer's disease have not been consistent.
They say the next step will be to determine which fruit and vegitables juices might provide the biggest protective benefits. "We don't know if it is a specific type of juice (that reduces risk). That information was not collected in the current study." The study was supported by the National Institute on Aging.