Look up reputable government studies .
I am a 67 yr old female and just got a calcium score of 100.
Study was done with participants taking 180 mcg of K2 daily. After 3 months improvement in elasticity was seen along with less deposits but took a full 2 years to really show substantial improvement and reversal.
I was not allowed to share link on this forum.
Natto is also Japanese food of fermented soy beans that contains a large amount of K2 but smells horrible. Sauerkraut is another but suppose supplement is only way to be sure you’re getting enough for the result.
Some comments on here about vitamin K are not correct as there are different K’s .
K1 for example is to do with blood clotting where as K2 is to do with keeping calcium where it is needed in the bones and not in arteries and soft tissues. It also helps to keep arteries flexible.
K2 MK 7 at 180 mcg is what was used.
Look at government studies with a large number of participants. Hope this is helpful