What happens if I don't get enough vitamin K? People who have had bariatric (weight loss) surgery.People with conditions (such as cystic fibrosis, celiac disease, ulcerative colitis, and short bowel syndrome) that decrease the amount of vitamin K their body absorbs.Newborns who don’t receive an injection of vitamin K at birth.However, certain groups of people may have trouble getting enough vitamin K: Also, bacteria in the colon make some vitamin K that the body can absorb. Most people in the United States get enough vitamin K from the foods they eat. Common forms of vitamin K in dietary supplements are phylloquinone and phytonadione (also called vitamin K1), menaquinone-4, and menaquinone-7 (also called vitamin K2).

Vitamin K is also available in supplements of vitamin K alone or of vitamin K with a few other nutrients such as calcium, magnesium, and/or vitamin D. Vitamin K is found in multivitamin/multimineral supplements. You can find links to more food sources of vitamin K in the last section of this fact sheet, Where can I find out more about Vitamin K? What kinds of vitamin K dietary supplements are available? Some fruits, such as blueberries and figs.Green leafy vegetables, such as spinach, kale, broccoli, and lettuce.You can get recommended amounts of vitamin K by eating a variety of foods, including the following: Vitamin K is found naturally in many foods. Average daily recommended amounts are listed below in micrograms (mcg). The amount of vitamin K you need depends on your age and sex. If you are taking a blood thinner such as warfarin (Coumadin®), it's very important to get about the same amount of vitamin K each day.

It’s important for blood clotting and healthy bones and also has other functions in the body. Vitamin K is a nutrient that the body needs to stay healthy. For more in-depth information, see our health professional fact sheet on Vitamin K.

Where can I find out more about Vitamin K?.

Does vitamin K interact with medications or other dietary supplements?.

What are some effects of vitamin K on health?.

What happens if I don't get enough vitamin K?.

What kinds of vitamin K dietary supplements are available?.

Download vitamin d vitamin k