Hello Check out the information on YouTube concerning the use of K2 / MK-7 Doctors say they have done studies in years past showing the use of K2 and how it can actually pull calcium out of the arteries. And there are no bad side affects from using it. Dosages could be 300 to 500 mcg or higher mcg's per day along with using D3. The K2 moves the D3 in your body to the areas which need it, like your bones. I have just started using K2 myself and I take 500 mcg a day. I'm 68.

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