My GP has had me on one DaVinci Nattokinase Plus capsule for years. I am 84 years old and heart wise my Cardio Dr. says my heart and vessels are in good condition for my age.
I trust all Mercola products as being of high quality - K2 = 180 mcg. I also like Carlyle K2+D3 in olive oil - one dropperful = 80 mcg K2 and 50 mcg (2000 IU) if Vitamin D.