A fifth of Scottish people believe jam counts as one of their five-a-day portions of fruit and veg.
The disturbing findings in a report by the Food Standards Agency may help to explain why the nation has the third highest obesity rates in the world behind only Mexico and the US.
Although jam does contain fruit it is often more than 60 per cent sugar meaning a very high calorie content.
Not fruit
Despite this it is perhaps slightly healthier than the notorious Scotttish export, the saturated fat laden deep fried Mars bar.
A report in the Economist last year highlighted the role of diet in Glasgow's abnormally high mortality rate.
Not veg
Other factors include higher levels of poverty and a generally gloomier outlook.