European governments have yet to introduce mandatory folic acid fortification of foods for neural tube defect prevention because of uncertainty about the long-term safety of high intake of folic acid. Novel folate-enriched eggs have been proposed as offering a practical way of increasing intake of natural folates, which do not have the same safety concerns as synthetic folic acid. Our objective was to estimate the potential increase in folate supply that could occur in European Union (EU) countries if normal eggs were replaced by folate-enriched eggs.

FAOSTAT data on daily per capita availability of eggs were linked to mean folate concentrations of un-enriched and folate-enriched eggs from three representative feeding trials from the recent literature.

Data were collated in Microsoft Excel.

The study used food balance sheets for Europe for 1961–2003 and for twenty-six individual EU countries for 2003.

There has been little variation in egg supply in Europe over the past 40 years, with eggs providing only about 1·3–1·6 % of total energy. In 2003, the average per capita egg supply across twenty-six EU countries was 32·8 g/d, equivalent to a little over half an egg. Even if the folate concentrations of all eggs across the EU were increased two- to threefold, per capita folate supply would increase only by about 25 μg/d.

At current enrichment levels, the availability of novel folate-enriched eggs will have little impact on folate supply in EU countries. In the absence of mandatory fortification, additional natural folate sources are needed urgently.