Saturday, May 26, 2012

Vitamin D Study: More Study Warranted

This is an example of the appropriate use of the associations in epidemiological studies:
Vitamin D is a steroid hormone that regulates calcium and phosphate levels in the bloodstream and promotes healthy bone growth. Vitamin D deficiency is common throughout the world and results in abnormalities of calcium, phosphorus and bone metabolism which can lead to muscle weakness, osteomalacia, osteopenia and osteoporosis. While some observational studies have shown that benefits of vitamin D may extend beyond bone health, research findings remain inconsistent.
“The role of vitamin D supplementation in the prevention and treatment of chronic non-skeletal diseases remains to be determined,” says Clifford Rosen, MD, of Tufts University School of Medicine and chair of the task force that authored the statement. “We need large randomized controlled trials and dose-response data to test the effects of vitamin D on chronic disease outcomes including autoimmunity, obesity, diabetes, hypertension and heart disease.”

This is what you should see in the conclusions of other epidemiological based reviews.

In my experience, there's nothing I've tried as a supplement that was as palpable or as fast acting as vitamin D supplementation following a period of non-supplementation.  What I notice is associated to physical performance, specifically recovery, which is notably better.

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