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It is known that production of MK-4 from dietary plant vitamin K 1 can be accomplished by animal tissues alone, as it proceeds in germ-free rodents. However, at least one published study concluded that "MK-4 present in food does not contribute to the vitamin K status as measured by serum vitamin K levels.
Small amounts are provided by animal-sourced foods. Vitamin K 2 is primarily from animal-sourced foods, with poultry and eggs much better sources than beef, pork or fish. [7] One exception to the latter is nattÅ, which is made from bacteria-fermented soybeans. It is a rich food source of vitamin K 2 variant MK-7, made by the bacteria. [17]
MK-4 is the major form of Vitamin K in vertebrate animals, including humans and common forms of meat animals. It is produced via conversion of vitamin K 1 in the body, specifically in the testes, pancreas and arterial walls. [2] The conversion is not dependent on gut bacteria, occurring in germ-free rats [3] [4] and in parenterally-administered ...
Animal feed is food given to domestic animals, especially livestock, in the course of animal husbandry. There are two basic types: fodder and forage. Used alone, the word feed more often refers to fodder. Animal feed is an important input to animal agriculture, and is frequently the
Food storage in refrigerators may not be safe unless there is close adherence to temperature guidelines. In general the temperature should be maintained at 4 °C (39 °F) or below but never below 1 °C (34 °F). [8] Safe storage times vary from food to food and may depend on how the food has been treated prior to being placed in the refrigerator.
The Coolgardie safe is a low-tech food storage unit, using evaporative cooling to prolong the life of whatever edibles are kept in it. It applies the basic principle of heat transfer which occurs during evaporation of water (see latent heat and heat of evaporation).
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In animal husbandry, a concentrated animal feeding operation (CAFO), as defined by the United States Department of Agriculture (USDA), is an intensive animal feeding operation (AFO) in which over 1,000 animal units are confined for over 45 days a year. An animal unit is the equivalent of 1,000 pounds of "live" animal weight. [1]