There are many good sources of vitamin K, including plants and animals. However, the quality of vitamin k differs substantially between them, since plants primarily produce K1 (phylloquinone) form while animals produce the K2 (menaquinone) form.
It is important to know that Vitamin K1 is almost not available as vitamin K2 bio. First of all, it is not absorbed nearly so and, secondly, that it is not as effective in the cells of the body to its primary function, activating certain proteins and to bind calcium.
The form of the plant, Vitamin K1, can be obtained through several different sources. However, the best are vegetables with green leaves, including kale, spinach, Swiss chard, broccoli and parsley. It is possible to obtain vitamin K, you need by eating plants, but you would have to eat a large quantity and 1000mcg of Vitamin K1 were found necessary to maximize the amounts of functional Osteocalcin, which is a major protein affected by vitamin k.
The animal form, K2, is the form that prefer human cells. It is found in a flat Japanese fermented soybeans called Natto. Other Natto, K2 is located exclusively in products of animal origin.
The types of pet foods that are rich in K2 include meat, eggs and organs. They contain much a greater amount if the animals are fed with grass, so it is always better to get fed meat if it is available and is not more expensive than what you are comfortable with the grass.
The best of all sources of vitamin k is high fat dairy. This is where we humans West get most of our vitamin k, and it is the superior animal form (K2). High fat dairy includes cheese, cream and butter, where the grass fed butter or butteroil is the richest source.
There was a study on the people, by comparing their consumption of high fat dairy (among other things). What researchers found was that those who ate the most had a 69% less likely to develop diseases of the heart that those eating the least. To put this in context, heart disease is the number one killer of worlds.
If you eat lots of gluten grains, then they can interfere with the absorption of fat soluble vitamin, and therefore, it might be preferable to minimize. It is also important to eat fat to be able to absorb the vitamin k and other fat-soluble nutrients.
One of the sources of vitamin k which we never short on is the bacteria in the intestine. They produce effectively so that a real vitamin k deficiency is extremely rare, and it is quite many unheard of except in infants who did not have their large intestine colonized again. This is the reason why infants are sometimes given beaten with vitamin k at birth.
