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How Much Vitamin D Do You Really Need to Take?

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  • Today’s vitamin D recommendations may be enough to help provide rickets, but it does nothing to give protection from cancer, heart disease, and infections. Most adults need about 8,000 units of vitamin D, while there are others who may need over that required amount to optimize their vitamin D levels.
  • Vitamin D requirements are highly individual, and the amount that your body needs may depend on numerous factors, including the color of your skin, your location, and how much sunshine you’re exposed to on a regular basis. It is important to have your levels tested regularly using a 25(OH)D or 25-hydroxyvitamin D test. Vitamin D levels should never go below 32 ng/ml. Instead, you should aim to have your levels between 50 and 70 ng/ml.
  • The best way to reach optimal vitamin D levels is through safe sun exposure. If this is not possible, you may use a safe tanning bed. Vitamin D supplementation is another option, provided that it is in the form of vitamin D3.
  • To discover the role of vitamin D in disease prevention, GrassrootsHealth has launched the D*Action Project, which will monitor the health outcomes of individuals who get their vitamin D levels within the optimal range. The project hopes to end the growing vitamin D deficiency epidemic and improve the health of millions of people. You can participate in this study by purchasing a D*Action Measurement Kit from Mercola.com.

Last November 3, 2009 at the University of Toronto, Ontario, Canada, noted doctors Cedric Garland and Tracey O'Connor ran a seminar on how vitamin D can be used to prevent breast cancer -- as well as infectious diseases, type 1 diabetes, hypertension, colon cancer, and falls in the elderly.

Presenters included some of the best known vitamin D researchers/practitioners, such as Robert P. Heaney, Reinhold Vieth, John White, and Susan Whiting.


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