Calcium supplements and bone health

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Overview of Vitamin D3

  • Cholecalciferol (D3) is a pro-hormone synthesized in human skin upon exposure to sunlight then metabolized in the liver and kidney to the biologically active form.  A single gel cap of this product contains approximately the same amount - of the same human hormone - a light skinned person would make if exposed to summer sun for a few hours.

  • Low levels of vitamin D are associated with weak bones, fractures, muscle weakness, muscle aches and falls.

  • Adequate blood levels of vitamin D - in conjunction with calcium - are required for bone health -- especially to prevent osteoporosis – and muscle action.


A well referenced update was recently published.  This is an excellent starting point for those seeking credible in depth information.  Note, however, that while there is a great deal of data, few conclusions should be drawn other than deficiency is widespread and appears to adversely impact several body systems.


Vitamin D and Health in the 21st Century: an Update

From vitamin D to hormone D: fundamentals of the vitamin D endocrine system essential for good health   Anthony W Norman

http://www.ajcn.org/cgi/content/full/88/2/491S


Why the big deal about D3 (cholecalciferol)?

"Vitamin D" can refer to a group of compounds. D3 is what our bodies make and were designed to use. Other forms are sometimes sold as "Vitamin D" but may be less predictable and are less potent.


Who should take supplemental Vitamin D3?

Sun exposure, diet, and aging affect vitamin D production and metabolism. Older adults and those not regularly in the sun need vitamin D supplementation. Pre and post menopausal women are especially at risk, but younger persons and men are not immune to the problems caused by low vitamin D levels.


Who should NOT take supplemental D3?

Persons with some malignancies, kidney stones, calcium or parathyroid disorders should take vitamin D only under the supervision of a physician.

Persons with metabolic, liver, bone, kidney, and digestive diseases and children, pregnant women or persons unsure of their health may need vitamin D3 but should consult a physician before using this or any nonprescription supplement.

 

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