Potential Perils of DIY Genetic Testing

Being told you have a genetic predisposition to alcoholism could make you feel you have less control over your drinking, a new study suggests.

The unique study adds to growing concern about the potential perils of direct-to-consumer genetic tests.

Psychologist Dr Ilan Dar-Nimrod from the University of Sydney and colleagues report their findings in the journal Genetics in Medicine.

He says the latest findings show how genetic information has the power to change a person's emotional state, behaviour and attitudes.

"We have about 1600 genetic tests available now," says Dar-Nimrod. "We should have better knowledge about how to communicate these results in a manner that doesn't create harm."

He says for a few genetic-related diseases, having a particular gene means you will definitely get the disease, unless you die of other causes first.

But in 98 per cent of cases the gene only increases your risk of a condition and that risk may be very small or very uncertain.

Despite the lack of certainty around the impact of many disease-related genes, Dar-Nimrod says there is some evidence that people...