Recently published data indicated that the Food and Nutrition Board made a statistical error when arriving at the recommended dietary allowance for vitamin D in 2010.

The statisticians estimated that 8,895 IU daily of vitamin D is needed to get 97.5% of the population above 20 ng/ml, or the level considered sufficient by the FNB. However, the analysis possessed a major limitation: there was no available data on individuals receiving over 2,400 IU daily.

In a letter to the statisticians, Dr. Heaney and colleagues confirmed that higher supplementation is needed to reach health vitamin D levels in 97.5% of the population by using data from the GrassrootsHealth study.

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