It is becoming increasingly apparent that current recommendations of vitamin D intake in the range of 200 – 600 IU/day are woefully inadequate. In 2007, a group of 15 prominent vitamin D and nutritional researchers, a veritable Who’s Who, published a plea entitled “The urgent need to recommend an intake of vitamin D that is effective”, which called for much higher daily recommended intakes.
One of those authors was researcher Dr Michael Holick, author of the recent book The Vitamin D Solution. In his book on page 219 he presents the following recommended daily intakes of vitamin D by supplementation.
* Nursing Mothers who want to ensure that their baby is getting enough vitamin D from their breast milk should take 4,000 – 6,000 IU/day.
The above recommendations are in addition to vitamin D obtained through sensible sun exposure.
Update November 30, 2010. A medical committee from the Institute of Medicine has released their report Dietary Reference Intakes for Calcium and Vitamin D, in which they recommend a daily increase in vitamin D intake to 600IU, but no change in calcium intake. The committee concluded:
Scientific evidence indicates that calcium and vitamin D play key roles in bone health. The current evidence, however, does not support other benefits for vitamin D or calcium intake. More targeted research should continue. However, the committee emphasizes that, with a few exceptions, all North Americans are receiving enough calcium and vitamin D. Higher levels have not been shown to confer greater benefits, and in fact, they have been linked to other health problems, challenging the concept that “more is better.”
These conclusions have brought vigorous rebuttals from several prominent vitamin D researchers and clinicians, which can be found here.