Limits of Vitamin D Supplements

Limits of Vitamin D Supplements
The New York Times, 12/13/2013

A large review of studies has found that vitamin D supplements have little or no benefit beyond the low levels required for bone health. The meta–analysis, published in The Lancet Diabetes & Endocrinology, combined data from 290 observational studies and 172 random trials. All the studies used blood levels of vitamin D to measure outcomes. Dosages varied, but most trials used 800 units or more. The observational studies generally found an association of lower vitamin D levels with increases in cardiovascular disease, lipid concentrations, glucose levels, weight gain, infectious disease and mood disorders. But random trials showed little or no effect of vitamin D supplements on any of these problems. The authors conclude that low vitamin D levels are almost surely an effect of these diseases, and not a cause. Current guidelines recommend supplements for anyone with a blood level under 30 nanograms per milliliter, but the lead author, Dr. Philippe Autier, said that only at levels of 10 or less would there be a risk to skeletal health. Less than 10 percent of Americans, he estimates, fall into this category. Dr. Autier is a researcher at the International Prevention Research Institute in Lyon, France.

About Dr Colin Holloway

Gp interested in natural hormone treatment for men and women of all ages

Posted on May 25, 2014, in Uncategorized. Bookmark the permalink. Leave a comment.

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