This 2021 study investigated Vitamins K₁ and K₂ associations with hospitalization for atherosclerotic cardiovascular disease (ASCVD):

“In this prospective cohort study, both dietary vitamin K₁ intake and vitamin K₂ intake were inversely related to ASCVD hospitalization risk, and very low vitamin K₁ was associated with a higher risk of ASCVD hospitalizations. Given very different food sources, these data support an independent protective effect for both subtypes of vitamin K.

Relatively higher vitamin K₂ intake in our cohort permitted discovery of a nonlinear, more U‐shaped association between vitamin K₂ intake and ASCVD risk, which, to the best of our knowledge, has not previously been described. This may reflect a competing increase in ASCVD risk associated with overconsumption of vitamin K₂‐rich foods (ie, cheese, eggs, butter).

Our study comes with some limitations common to nutritional epidemiology, and has significant strengths:

• A large sample size with up to 23 years of follow‐up, allowing for accumulation of a high number of events;
• Availability of important participant characteristics, enabling appropriate methods to be employed to reduce residual confounding; and
• Minimal loss to follow‐up (<0.3%).”

https://www.ahajournals.org/doi/10.1161/JAHA.120.020551 “Vitamin K Intake and Atherosclerotic Cardiovascular Disease in the Danish Diet Cancer and Health Study”

Daily broccoli / red cabbage / mustard sprouts for Vitamin K₁, and a supplement for Vitamin K₂ is what I do. Expect more than staying out of hospitals, but don’t know whether previous damage can be repaired.

Looking forward