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Worse, it's a just-so story. NZ might have more sunlight-hours, but it's also decades into public heath measures to minimise sun exposure aimed at countering world-leading melanoma rates.

32% kiwis low-deficient levels of Vit D (NZ MoH Adult Nutrition Survey 2008/09 http://bit.ly/UHLXK7) cf "up to a quarter" in the UK (National Diet and Nutrition Survey 09/10 by way of the UK’s 4 Chief Medical Officers http://bit.ly/zUXopv).

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