Here in the UK we are nearly all deficient in Vitamin D, especially at the end of winter. Vitamin D helps the immune system work well. 10,000iu seems to be the dose required to increase Vitamin D to the recommended 40ng - 80ng per ml of blood. I can't tell you if it works yet, but I do feel better, and time will tell.
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I recommend it, I have been using it for almost three years
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A great product and a fair price. I will be purchasing this again.
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very good product
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natural product
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