Final answer:
The primary source of vitamin K in the diet is green leafy vegetables like cabbage and spinach, as well as foods like cauliflower, soybeans, and wheat germ.
Step-by-step explanation:
Vitamin K is primarily sourced from green leafy vegetables such as cabbage and spinach, as well as foods like cauliflower, soybeans, and wheat germ. Animal products contain small amounts of vitamin K, with milk and eggs being the most notable sources. Additionally, vitamin K2 is produced by bacteria in the human intestine if it is not supplied through the diet.