Leader: Genetic forecasting outlook can only be gloomy

Advances in medical science have changed our lives, and changed the world. Diseases which once killed millions have been contained or eradicated. Conditions which might have blighted children for a life cut short, can be cured.

Yet there is something in the discovery by Scottish cardiologist Euan Ashley that whole families could soon have their genes analysed so as to predict what health problems they may have in the future that is a little troubling.

Of course, there will be benefits, in terms of identifying potential health problems and dealing with them before they occur, but we have to ask: Do we really want to have our genetic disposition to certain diseases set out in front of us from an early age?

The downside is obvious: those already prone to hypochondria could become even worse. If your genes say you may have a heart problem, every short breath will be a worry. If your genetic map shows you might be prone to skin diseases, every lump or bump will have you consulting your doctor.

If this breakthrough can prevent ill health, it is welcome, but there is the distinct possibility that such genetic crystal-ball gazing might actually make people’s mental, if not physical, health worse and not better.