Vitamin K is an essential nutrient that plays an important role in normal blood clotting and bone health. It is found mainly in green leafy vegetables, but other foods can also provide vitamin K as part of a balanced diet.

Eating a variety of vitamin K-rich foods can help you meet your nutritional needs. The amount of vitamin K in foods varies considerably, so including different vegetables and other nutrient-rich foods can help provide a balanced intake.

Key Takeaways

  • Vitamin K is important for normal blood clotting and bone health.
  • Leafy green vegetables are among the richest dietary sources of vitamin K.
  • Other sources include broccoli, Brussels sprouts, cabbage, green beans, and some vegetable oils.
  • Vitamin K comes mainly in two forms: vitamin K1 and vitamin K2.
  • Most people can get enough vitamin K through a varied and balanced diet.
  • People taking warfarin or other vitamin K-sensitive anticoagulants should discuss major dietary changes with their healthcare professional.

What Is Vitamin K?

Vitamin K is a fat-soluble vitamin that the body needs for several important functions. It is particularly important for proteins involved in blood clotting and also contributes to maintaining healthy bones.

Vitamin K is found naturally in several forms. Vitamin K1, also called phylloquinone, is found mainly in plant foods, especially green leafy vegetables. Vitamin K2 refers to a group of compounds called menaquinones, which are found in some animal and fermented foods.

What Foods Are Rich in Vitamin K?

Green leafy vegetables are among the best dietary sources of vitamin K. Including a variety of vegetables in your meals can help increase your vitamin K intake while also providing fiber and other vitamins and minerals.

Kale

Kale is one of the most concentrated sources of vitamin K. It can be eaten raw in salads or added to soups, stews, and cooked vegetable dishes.

Spinach

Spinach provides a substantial amount of vitamin K along with folate, vitamin A, vitamin C, and other nutrients. Both raw and cooked spinach can contribute to dietary vitamin K intake.

Collard Greens

Collard greens are another excellent source of vitamin K. They can be prepared as a cooked side dish or incorporated into soups and other meals.

Broccoli

Broccoli provides vitamin K as well as fiber, vitamin C, and other nutrients. It can be steamed, roasted, or added to salads and mixed dishes.

Brussels Sprouts

Brussels sprouts are a useful source of vitamin K and can be included as part of a balanced vegetable intake. Roasting, steaming, or lightly cooking them can make them an easy addition to meals.

Cabbage

Cabbage contains vitamin K and can be eaten raw or cooked. Different varieties of cabbage can contribute to overall vegetable and vitamin K intake.

Green Beans

Green beans provide vitamin K along with fiber and other nutrients. They can be used as a side dish or added to salads, soups, and vegetable-based meals.

Parsley and Other Herbs

Fresh herbs such as parsley can contain significant amounts of vitamin K. Although herbs are generally consumed in smaller portions, they can still contribute to overall vitamin K intake.

Vitamin K1 vs. Vitamin K2: What Is the Difference?

Vitamin K1 and vitamin K2 are different forms of vitamin K. Vitamin K1 is found mainly in green leafy vegetables and other plant foods, while vitamin K2 includes several compounds found in certain animal foods and fermented foods.

Both forms are involved in vitamin K-dependent processes in the body, particularly those related to blood clotting. Their sources and how they are handled by the body can differ.

Why Is Vitamin K Important?

Vitamin K has several important functions in the body, particularly in blood clotting and bone health.

Supports Normal Blood Clotting

Vitamin K is required to produce several proteins involved in normal blood clotting. Without adequate vitamin K, the blood's ability to clot properly can be affected.

Supports Bone Health

Vitamin K is involved in the production of proteins that contribute to bone metabolism. Adequate vitamin K intake is therefore part of a nutrient-rich diet that supports healthy bones.

How Much Vitamin K Do You Need?

Vitamin K requirements vary by age and life stage. For adults, adequate intake is generally around 90 micrograms per day for women and 120 micrograms per day for men.

Most healthy adults can obtain sufficient vitamin K from a varied diet. Individual nutritional needs may differ depending on health status, medications, and other factors.

What Happens If You Don't Get Enough Vitamin K?

Vitamin K deficiency is uncommon in healthy adults because vitamin K is available from many foods and the body can obtain some vitamin K through intestinal bacteria.

When deficiency occurs, it can interfere with normal blood clotting and increase the risk of bleeding. Certain medical conditions, digestive disorders, or medications may increase the risk of deficiency.

Can You Get Too Much Vitamin K From Food?

Vitamin K from foods is generally considered safe for healthy people. However, vitamin K can interact with certain anticoagulant medications, particularly warfarin.

People taking warfarin are usually advised to maintain a consistent intake of vitamin K rather than suddenly increasing or decreasing the amount they consume. Significant dietary changes should be discussed with a healthcare professional.

How Can You Add More Vitamin K to Your Diet?

Adding vitamin K-rich foods to everyday meals does not have to be complicated. Simple changes can increase your intake while also improving the overall nutritional quality of your diet.

  • Add spinach or kale to salads and sandwiches.
  • Include broccoli or Brussels sprouts as a vegetable side dish.
  • Use fresh parsley and other herbs when preparing meals.
  • Add leafy greens to soups, omelets, or grain-based dishes.
  • Choose a variety of vegetables throughout the week rather than relying on a single food.

Clinical Insight

Vitamin K is an essential nutrient involved in normal blood clotting and bone metabolism, and most healthy adults can obtain adequate amounts through a varied diet. Leafy green vegetables are particularly rich sources, but vitamin K intake should be considered alongside medications and individual health conditions. People taking warfarin or other anticoagulants should maintain a consistent dietary intake and discuss significant dietary changes with their healthcare professional.

Which Department Should I Visit for Vitamin K Deficiency?

For suspected vitamin K deficiency or concerns about nutritional deficiencies, Internal Medicine can provide an initial evaluation. Depending on the symptoms and underlying cause, further assessment by another specialist or a registered dietitian may also be recommended.

References

Medical Services Internal Diseases
Created at Eki 5, 2026
Updated at Eki 5, 2026
Editor Semih PEKENGİN Online Physician

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Frequently Asked Questions. About Vitamin K

Leafy green vegetables such as kale, spinach, collard greens, and other dark green vegetables are among the richest sources of vitamin K. Broccoli, Brussels sprouts, cabbage, green beans, and fresh herbs such as parsley also provide vitamin K.

Dark green leafy vegetables are some of the best dietary sources of vitamin K1. Foods such as kale, spinach, and collard greens can provide substantial amounts of vitamin K as part of a balanced diet.

Yes. Vitamin K is involved in the production and function of proteins associated with bone metabolism. Adequate vitamin K intake, together with other nutrients and healthy lifestyle habits, supports normal bone health.

Vitamin K deficiency can interfere with normal blood clotting and may increase the risk of unusual or prolonged bleeding. Deficiency is uncommon in healthy adults but can occur in certain medical conditions or situations that affect vitamin absorption.

Yes. Most healthy adults can obtain enough vitamin K through a varied diet that includes vegetables, particularly leafy greens. Individual needs can vary depending on health conditions and medications.

Yes. Vitamin K can affect the way warfarin works. People taking warfarin should generally keep their vitamin K intake consistent and discuss major changes to their diet with their healthcare professional.

Eggs contain some vitamin K, but they are not considered one of the richest dietary sources. Green leafy vegetables generally provide much higher amounts of vitamin K.

Bananas contain vitamin K, but the amount is relatively small compared with leafy green vegetables. They can still be part of a varied and balanced diet.

Cooking can affect the nutrient content of vegetables in different ways, but cooked vegetables can still provide vitamin K. The overall amount depends on the food, cooking method, and portion size.

Vitamin K deficiency is uncommon in healthy adults. The risk may be higher in people with conditions that interfere with fat absorption, certain digestive disorders, or specific medical circumstances that affect vitamin K absorption or metabolism.