The use of genetic testing kits is on the rise, promising to reveal what your DNA says about your health, traits and ancestry. Despite concerns being raised around who this information could be shared with, understanding our genetic information has the potential to transform the NHS and revolutionise patient treatment. Leading personalised medicine experts Joanne Hackett and Munir Pirmohamed consider the benefits and risks of DNA testing technology and discuss how it could pave the way for personalised treatments for diseases such as cancer with Vivienne Parry.