@way
Fat soluble vitamins K2 and D3 (and A and E ) compete for the same receptors (or pathways) in digestion. In small doses there are plenty of receptors and the two or four vitamins can be taken together. A multivitamin tablet can limit the absorption usually of vitamin K2, because vitamin D3 generally is provided in much greater amounts than than K2.
Because D3 increases the absorption of calcium and K2 directs the absorption of calcium they are said to work best together in the bloodstream.
It is probable that by taking these two vitamins separately you have better control of how much Vitamin K2 your body will absorb.

@way and, to confuse us more, there are those who say don’t take calcium, don’t eat extra dairy….then, the concern about oxalates—some say small amount okay if it is eaten with other foods…then the concerns about these things and current meds….all enough to drive one crazy !