How do you test for the 'Celtic Curse'?
Thousands of people are being offered screening for an iron overload disorder known as the Celtic Curse.
It follows the death of an Aberdeenshire woman last year after a late diagnosis of genetic haemochromatosis, a condition which causes too much iron to build up in the body.
If untreated it can cause life-threatening complications including liver disease, cancer and heart disease.
BBC Scotland correspondent Laura Goodwin explains how the screening system works.
