Archive for December, 2012

Sun exposure and vitamin D in New Zealand

Vitamin D and the Sun… Now’s the best time…

It’s common knowledge that we can synthesize vitamin D in our skin from the sun… But few people realise that you can only make it between 10am and 3pm in SUMMER!  This is because the UVB only gets through the atmosphere when the sun is at it’s highest.  We can also get Vitamin D in our diet, being a fat soluble vitamin, it’s only found in animal fats and seeing that most of New Zealand is on a low fat diet it’s easy to see why 84% of New Zealanders’ are deficient in this vital vitamin.

Vitamin D controls the DNA of your cells and in one study at Creighton University they found Vitamin D reduced cancer by 77%.  It also helps control belly fat through the role of insulin, plays a key role in the production of pancreatic enzymes, controls the level of calcium in the blood and bone to name a few…

We really want your blood vitamin D levels above 80 nmol and if diabetic above 120mol.  In my last blood test (which happened to be in winter) my vitamin D blood levels were 123nmol (which is great but I eat a lot of lard and also supplement through BePure ONE).

The Recommended Daily Intake of vitamin D is 400 IU.  Expose 5% of your body to full sun for 20 minutes and you’ll produce 100-200 IU of Vitamin D.  Full body exposure of 20 minutes can result in thousands of IU of Vitamin D.  Your body cannot make Vitamin D if you are wearing sunscreen, and of course, it is important not to burn your skin and so we are only talking a maximum of a single 20 minute sun exposure a day (depending on your skin type, less if you are fairer).

You would need to do this daily for the next 3 months to raise your blood vitamin D levels by 20 nmol, which 84% of New Zealanders need to do.  So, if you cannot get full skin exposure for 20 minutes a day for the next 3 months, I would recommend you supplement either a specific vitamin D supplement (like this one) or by taking a high quality Multi-Vitamin supplement like BePure ONE.  With supplements you want to make sure you are getting D3 as this is the the most biologically active form of Vitamin D supplement.


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