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  1. Vitamin D Supplements May Be Necessary Vitamin D Supplements May Be Necessary December 9, 2011

    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 optimal circumstances.

  2. Vitamin D and Mortality May Be a U-shaped Curve Vitamin D and Mortality May Be a U-shaped Curve December 8, 2011

    Vitamin D deficiency may shorten one’s lifespan, but getting too much vitamin D may also adversely affect longevity.

  3. Evolutionary Argument for Optimal Vitamin D Level Evolutionary Argument for Optimal Vitamin D Level December 6, 2011

    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?

  4. Melatonin & Breast Cancer Melatonin & Breast Cancer May 30, 2011

    There are components of our diet that may increase cancer risk by mimicking the role of light pollution in melatonin suppression.

  5. Vitamin D Pills vs. Tanning Beds Vitamin D Pills vs. Tanning Beds May 29, 2011

    A reclassification of tanning beds as a category 1 carcinogen underscores the importance of vitamin D supplementation for those at risk for deficiency.