When taking the blood thinner Coumadin, also called warfarin, you need to eat a consistent amount of vitamin K each day. Coumadin slows down the blood-clotting actions of vitamin K, so the appropriate dosage depends on how much vitamin K you consume. Vitamin K is found in significant amounts in green leafy vegetables, avocado, asparagus, peas, prunes and tuna canned in oil, so you need to watch your intake of these foods. This still leaves a lot of iron-rich foods for you to choose from.
Foods high in iron have at least 3.6 milligrams of iron, or 20 percent of the daily value. Breakfast cereals are often fortified with 100 percent of the daily value for iron, but rarely contain significant amounts of vitamin K. Some types of seafood are also low in vitamin K and high in iron, such as clams, cuttlefish, octopus and oysters. Other animal-based sources of iron include turkey breast and lean beef plate steak. Although some beans are a bit higher in vitamin K, lentils and navy beans don't contain a lot of this nutrient but contain significant amounts of iron.