Fortified bread could help people get more vitamin D in their diets, according to a new study published in the ACS Journal of Agricultural and Food Chemistry.
Laboratory tests on rats have shown that bread made with yeast high in vitamin D2 had the same effects as the valuable vitamin D3 that comes from the sun.
It is believed the findings will help boost diets in the winter and fill a gap for people who are unable to get enough vitamin D.
The American research cites studies suggesting seven in 10 people in the United States may not get enough vitamin D, with insufficiency linked to an increased risk of heart disease, cancer and allergies in children.
Although it has long been added to milk, researchers claim this does not provide a good enough source.
The latest study has eased doubts that bread baked with high vitamin D yeast can offer a solution.
Authors of the research said: “Our results suggest that bread made with high vitamin D yeast could be a valuable new source of vitamin D in the diet.”