Genetic testing

In a breakthrough, scientists have discovered that a variant in one gene can cause mental illnesses – something previously believed to only be the result of several variants working together. What's more, these conditions often develop in childhood.

Groundbreaking research has uncovered three gene variants that increase the risk of attention-deficit/hyperactivity disorder by up to 15 times. It's a remarkable finding, considering that thousands of mutations only come with a nominal elevated risk.