I have been using this product for four years. My blood was thick but now It has thinned out and I get great blood test results. I refused to take warfin (rat poison) . I never have to worry about bleeds with natto k. I take one cap at bedtime.
Ingredients include calcium citrate which is a form easily used within the body. It has enzymes that work very good with the natto. Just one a day, and it works too get rid of excess fibrin to increase circulation.