People in Donegal are lacking in vitamin D because they're not getting enough sunshine.
A local GP reviewed 10,000 tests carried out in Letterkenny University Lab.
The lack of sunshine in the county is being blamed for the low levels of the vitamin and high number of people with osteoporosis.
Dr Martin Coyne says we should go out in the sun without suncream for 15 minutes a day.
Stock image: Pixabay