That's an insane dosage. Is K2 better than K1?
They actually sell some K2 in 5 MILLIGRAM caps on ebay and amazon. Supposedly very high dose vitamin k is used in Japan to decalcify arteries but I don't know if that's actually true. Each type of k1/k2 has different effects/half lives.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7238900/"Matrix GLA protein (MGP)—found in the tissues of the heart, kidneys, and lungs—plays a dominant role in vascular calcium metabolism. Its production is stimulated by Vitamin D3, but it requires adequate Vitamin K2 intakes to be activated (similar to the bone-building protein osteocalcin). Once activated by Vitamin K2, MGP can bind calcium and escort it out of the areas where this mineral is destructive, namely arteries and soft tissues.1,4
No other productive mechanism for maintaining flexible blood vessels walls has been discovered, which makes MGP the only known and most potent existing inhibitor of cardiovascular calcification.
That is why Vitamin K2 is crucial as a cardiovascular health nutrient. Here we will endeavor to clear up considerable confusion about Vitamin K2, ensuring the right form is identified, as well as provide the substantial body of evidence confirming its role as a cardiovascular-support nutrient."