!YouTube Video 47 Mega Bytes

Excellent information - but the video is just Dr. Cannell talking.

Two versions of the audio are attached at the bottom of this page

• 15 minutes = regular speed (7 Mega Bytes)
• 10 minutes = speeded up by 30% (2 Mega Bytes)

Talks about a paper by Dr. Sunil Wimalawansa

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Vitamin D in the New Millennium.

Curr Osteoporos Rep. 2012 Jan 17.
Wimalawansa SJ.
Physiology & Integrative Biology, Endocrinology, Metabolism & Nutrition, UMDNJ-Robert Wood Johnson Medical School, New Brunswick, NJ, USA, wimalasu at umdnj.edu.

The incidence of vitamin D deficiency is rising worldwide, yet in the vast majority of patients, the condition remains undiagnosed and untreated. Current evidence overwhelmingly indicates that supplemental doses greater than 800 IU/day have beneficial effects on the musculoskeletal system, improving skeletal homeostasis, thus leading to fewer falls and fractures. Evidence is also accumulating on the beneficial effects of vitamin D on extraskeletal systems, such as improving immune health, autoimmune disorders, cancer, neuromodulation, diabetes, and metabolic syndrome. The cause-effect relationship of vitamin D deficiency with increasing incidences of nonskeletal disorders is being investigated. Published reports support the definition of sufficiency, serum levels of 25-hydroxyvitamin D [25(OH)D] greater than 30 ng/mL (75 nmol/L).

To achieve this, most people need vitamin D supplementation ranging from 600 to 2000 IU/day; consumption up to of 5000 international units (IU) per day of vitamin D is reported as safe.

Although light-skinned individuals need 1000 IU/day of vitamin D, elderly and dark-skinned individuals are likely to need approximately 2000 IU/day to maintain serum 25(OH)D levels greater than 30 ng/mL. Other vulnerable patients, such as the obese, those who have undergone bariatric surgery, and those with gastrointestinal malabsorption syndromes, may require higher doses of vitamin D to maintain normal serum levels and be healthy.

PMID: 22249582
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Dr. Cannell mentioned a new book by Dr. Sunil Wimalawansa for medical professionals and the lay public

Vitamin D: Everything you need to know
which was published in Aug 2012