Rich animal sources include high fat dairy products from grass-fed cows and egg yolks, as well as liver and other organ meats.
Vitamin K is fat-soluble, which means low fat and lean animal products don’t contain much of it.
Animal foods contain the MK-4 subtype, while fermented foods like sauerkraut, natto, and miso pack more of the longer subtypes, MK-5 to MK-14.
If these foods are inaccessible to you, taking supplements is a valid alternative, but Talk to a healthcare provider first.