Objective: To estimate vitamin D intakes in a representative sample of Irish adults and to assess the contribution of foods to these intake estimates.Design: Vitamin D intakes in 1379, 18-64-y-old adults from the North/South Ireland Food Consumption Survey were estimated using a combination of new analytical data for vitamin D in foods, determined by HPLC, and used to revise recipe calculations, together with existing data from McCance and Widdowson's The Composition of Foods, 5th Edition plus supplements.Results: The total mean daily intake ( MDI) of vitamin D (1 mug=40 IU) from all sources was 4.2 mug. The MDI was significantly higher (P<0.001) when the contribution from nutritional supplements was included ( 4.2 mg) compared with food sources only (3.2 μg). Men had significantly higher intakes (4.4 μg) than women (4.0 μg; P<0.001), which increased significantly (P<0.001) with age in both sexes. Meat/meat products (30.1%), fish/fish products (14.3%) and eggs/egg dishes (9.1%) were the main contributors to vitamin D intake. Supplements contributed 6.8 and 12% to MDI in men and women, respectively. In all, 74% of adults had an MDI of vitamin D that was less than the median (5 mg) of the recommended daily range of 0-10 mg.Conclusion: The findings of this study suggest that a large number of Irish adults have low vitamin D intakes. This, along with emerging evidence of low vitamin D status in at least some population subgroups, suggests that strategies to increase vitamin D intakes, including fortification of food, should be investigated.