If you learned your DNA made you more susceptible to getting a disease, wouldn’t you work to stay healthy?
You’d quit smoking, eat better, ramp up your exercise, or do whatever else it took to improve your odds of avoiding maladies like obesity, diabetes, heart disease or cancer, right?
The scientific evidence says: Don’t bet on it.
DNA tests for diseases typically assess genetic predisposition to getting sick. They don’t provide absolute predictions about whether or not a disease will strike. Genetic risk is only part of a person’s overall risk, which includes influence from other things like a person’s lifestyle.
Last year, researchers published an analysis that combined 18 studies of people who got doctor-ordered DNA test results about disease risks. None involved direct-to-consumer tests; participants were drawn mostly from medical clinics or elsewhere. Eight of the 18 studies were done in the United States.
The result? Getting the DNA information produced no significant effect on diet, physical activity, drinking alcohol, quitting smoking, sun protection or attendance at disease-screening programs.
That fits with other results showing that, on balance, getting the information “has little if any impact on changing routine or habitual behaviours ,” said psychologist Theresa Marteau of Britain’s Cambridge University, a study author.
The GLP aggregated and excerpted this blog/article to reflect the diversity of news, opinion, and analysis. Read full, original post: Science Says: DNA test results may not change health habits