Vitamin D RDA should be cut 50 percent, study finds – The San Diego Union-Tribune

The recommended dietary allowance of 800 International Units of vitamin D for bone health should be cut in half, according to a study released Sunday at the 2017 scientific meeting of the Endocrine Society.

An RDA of 400 IU of vitamin D daily is enough for 97.5 percent of the population, according to the study. The abstract can be found at

Since older women generally need more vitamin D for bone health than younger people, the 400 I.U. limit would suffice for them as well.


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