WARNING no beneficial Vitamin-D UVB in Vancouver winter sun

WARNING no beneficial Vitamin-D UVB in Vancouver winter sun

WARNING no beneficial Vitamin-D UVB in Vancouver winter sun

Vancouver Gadgeteers Rob Matthies tests reveal no beneficial Vitamin-D UVB detected in Vancouver early sunlight WARNING no beneficial Vitamin-D UVB in Vancouver winter sun

User: amateur-inventor

Views: 52

Uploaded: 2011-02-18

Duration: 01:43

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