Professor Rose Anne Kenny:

That should be 800 to 1,000 units daily. Nursing Homes Ireland sent a recommendation to all of their nursing homes to ensure nursing home patients are on vitamin D supplementation. If they were not, one would generally double up the daily dosage for a number of weeks until such a time as one is satisfied the levels are within the range one wants and then continue with a lower dose of daily supplementation. That is the guidance that Nursing Homes Ireland has provided.