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February 3, 2012
Vitamin B12 Recommendation Change
Based on two biomarkers of functional vitamin B12 (cobalamin) status, B12 recommendations formulated more than a half century ago may need to be updated.
December 14, 2011
Resolving the Vitamin D-Bate
Why the current vitamin D recommendations may be too low, other expert recommendations may be too high, and 2000 international units a day may be just right.
December 13, 2011
How the Institute of Medicine Arrived at Their Vitamin D Recommendation
The latest revision of the official vitamin D recommendations were based on the body's reaction to protect bone health, but what about the other three dozen affected organs?
December 12, 2011
The Difficulty of Arriving at a Vitamin D Recommendation
People respond differently to the same level of vitamin D supplementation, making it difficult to formulate one-size-fits-all guidelines.
December 9, 2011
Vitamin D Supplements May Be Necessary
To reach the circulating (25-hydroxy) vitamin D levels associated with the lowest overall mortality, one may need to take supplements, given data suggesting suboptimal production from sun even under...
December 8, 2011
Vitamin D and Mortality May Be a U-shaped Curve
Vitamin D deficiency may shorten one's lifespan, but getting too much vitamin D may also adversely affect longevity.
December 7, 2011
Is Vitamin D the New Vitamin E?
The Institute of Medicine's conservative position on vitamin D is understandable given the history of hyped vitamin supplements (vitamin A, beta carotene, folic acid, vitamin C, vitamin E) that...
December 6, 2011
Evolutionary Argument for Optimal Vitamin D Level
Should the vitamin D levels found in lifeguards be considered the norm for our species given the fact that we evolved running around naked all day in equatorial Africa?
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