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Why vitamin D in milk is no good

Posted Oct 27 2006 2:04am
(Extract from comments made by Dr. Joseph Mercola, www.mercola.com )

Basically there are two types of oral vitamin D supplements. The natural ones are D3, and they contain the same vitamin D your body makes when exposed to sunshine. The synthetic ones are vitamin D2, which are sometimes called ergocalciferol.

Once either form of the vitamin is in your body, it needs to be converted to a more active form. Vitamin D3 is converted 500 percent faster than vitamin D2. While there have been no clinical trials to date demonstrating conclusively that D2 prevents fractures, every clinical trial of D3 has shown it does.

However, nearly all the prescription-based supplements contain synthetic vitamin D2, which was first produced in the 1920s through ultraviolet exposure of foods. The process was patented and licensed to drug companies for use in prescription vitamins. In case you didn't know, the vitamin D that is added to milk is NOT D3 but the highly inferior vitamin D2.

The study linked above concluded that "vitamin D2 should no longer be regarded as a nutrient appropriate for supplementation or fortification of foods."

That being said, optimizing your sun exposure and levels of vitamin D3 may, indeed, be one of the most important physical steps you can take in support of your long-term health.

Conventional medicine is finally beginning to get on board the vitamin-D3 bandwagon, using the natural power of sunshine to treat type 2 diabetes, osteoporosis during a woman's pregnancy and even tuberculosis.

It is important to understand that the ideal and STRONGLY preferred method of increasing your vitamin D3 level is through appropriate sun exposure. I really do not advise oral supplements, not even cod liver oil now, UNLESS you can have your blood levels regularly monitored.

It just is too risky. I have seen too many potentially dangerous elevations of vitamin D levels, including my own, from those that are taking oral supplements.

But when you get your vitamin D from appropriate sun exposure your body can indeed self-regulate and greatly reduce vitamin D production if you don't need it, which makes it very difficult to overdose on vitamin D from sun exposure.
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Note: The book The Milk Imperative explains why vitamin D is a double edged sword, and why it is actually harmful to health when added to milk.
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