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Summary from the following presentation:

It is advisable that we should maintain adequate Vitamin D intake from exposure to summer-strength sunlight, certain foods and/or supplements in order to achieve a protective level of Active 1,25(OH)2D. However, when a Vitamin D test is conducted, it measures the level of 25(OH)D that is freely circulating in the blood stream which is then converted by the liver into Active 1,25(OH)2D.

Many experts suggest we should maintain 40-60 ng/ml or the UK equivalent, 100-150 nmol/L of Serum 25(OH)D in order to minimise the risk and severity of a Covid-19 infection, seasonal influenza and other harmful to health pathogens.  



Instructions For Vitamin D Test Kit: