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Study Dismisses Commercial DNA Testing For Disease
POSTED: 3:31 pm PDT April 20, 2009
UPDATED: 5:57 pm PDT April 20, 2009
BAKERSFIELD, Calif. -- For around $500, consumers can have their DNA analyzed for genes that are linked to various diseases.There are many different genes that are implicated in common illnesses such as diabetes and heart disease -- but each gene has just a small influence on a person's risk.Researchers from Harvard wondered if adding multiple genes together could determine a person's odds of developing diabetes.
They took DNA samples from more than 6,000 patients -- some who had type 2 diabetes. Scientists analyzed patients' DNA for 10 genetic variations that have been linked to diabetes risk.But the test did not help much in predicting type 2 diabetes.Once doctors factored in traditional risk factors such as a person's age, weight, family history and lifestyle habits, the genetic analysis only improved the prediction by 1 percent.Experts said that DNA tests for disease may improve within a few years. But for now, patients should save their money and concentrate on lowering their odds for diabetes by eating a healthy diet, exercising and watching their weight.
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Copyright 2009 by TurnTo23.com. The Associated Press contributed to this report. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
