Different DNA markers can identify medical problems, often before other symptoms appear. In some cases, DNA helps to prolong or even save lives.
In some cases, DNA can even predict the future. Scientists can now determine whether a fetus has any chromosomal abnormalities that could cause a genetic disorder. For example, DNA testing can reveal if an unborn baby will have trisomy 21, or Down syndrome.
As scientists keep exploring the information available in your genes, new possibilities arise. Scientists have now identified several gene variants that may predispose us, and our children, to obesity. Rodent studies have also shown that up to 80% of body fat is regulated by our genes, according to TIME at http://goo.gl/G0Ipp.
Don't expect your doctor to offer a customized DNA Diet just yet. This is a new and emerging field of study. Researchers are still trying to figure out how genetics, nutrition and exercise are related so we can help people lose weight and keep it off.