Vitamin K2: A Comprehensive Guide

Vitamin K2, an often overlooked but critical nutrient, plays a vital role in our health. It’s an essential fat-soluble vitamin that contributes to blood clotting, bone health, and heart health. Despite its importance, Vitamin K2 is frequently overshadowed by its more renowned counterparts – vitamins A, B, C, and D. In this comprehensive guide, we delve into what Vitamin K2 is, its numerous health benefits, common sources to include in your diet, signs of deficiency, and recommended dosage. Join us as we explore this pivotal, yet underappreciated, component of our nutritional needs.

What is Vitamin K2?

Vitamin K2, scientifically referred to as menaquinone, is an essential fat-soluble vitamin that falls under the umbrella of the Vitamin K family. This crucial nutrient plays a pivotal role in maintaining overall health and well-being. Unlike its counterpart, Vitamin K1 (phylloquinone), which is primarily involved in blood clotting, Vitamin K2 has various roles in our body. It helps regulate calcium levels and plays a crucial role in maintaining healthy bones, teeth, and blood vessels. It also assists in activating proteins that help prevent cardiovascular disease and other chronic conditions.

Benefits of Vitamin K2

  1. Supports Bone Health: Vitamin K2 is essential for proper bone mineralization, helping to prevent osteoporosis and maintain strong bones as we age.
  2. Improves Heart Health: By activating proteins that prevent calcium buildup in the arteries, Vitamin K2 helps improve heart health and reduce the risk of cardiovascular disease.
  3. May Reduce Cancer Risk: Some studies suggest that Vitamin K2 may have anti-cancer effects by inhibiting the growth of cancer cells and promoting cell death.
  4. Supports Dental Health: Vitamin K2 plays a role in maintaining dental health by helping to remineralize teeth and preventing tooth decay.
  5. May Improve Insulin Sensitivity: Vitamin K2 has been shown to improve insulin sensitivity, making it beneficial for those with diabetes or at risk of developing diabetes.

Blood clotting

Vitamin K2, although often overshadowed by its other benefits, plays a vital role in blood clotting. This essential function should not be overlooked, as it is what enables our blood to coagulate and prevent excessive bleeding when we experience an injury or cut. By facilitating the activation of certain proteins involved in the clotting process, Vitamin K2 ensures our body’s ability to respond effectively to such situations, promoting efficient wound healing and overall well-being.

What is the impact of vitamin K2 on blood pressure?

Studies have shown that Vitamin K2 may help lower blood pressure by preventing calcium from depositing in the arteries. Which can lead to high blood pressure. Additionally, Vitamin K2 helps activate a protein called osteocalcin, which has been linked to regulating blood sugar levels and improving insulin sensitivity.

Food Source

A wide range of foods contain Vitamin K2. Here, we present you with a list of the most prevalent sources:

  • Fermented Foods: Natto, a traditional Japanese food made from fermented soybeans, is one of the richest sources of Vitamin K2. Other fermented foods like sauerkraut, kimchi, and kefir also provide this key vitamin.
  • Animal Products: Dairy products from grass-fed cows, such as cheese and butter, are good sources. Egg yolks, chicken liver, and other organ meats also contain Vitamin K2.
  • Certain Seafood: Fatty fish like salmon, mackerel, and sardines are not only rich in Omega-3 fatty acids but also provide Vitamin K2.
  • Dark Meat Poultry: The darker meat of chicken and turkey is a better source of Vitamin K2 than the white meat.
  • Hard Cheeses: Hard cheeses like Gouda and Jarlsberg are known for their high Vitamin K2 content.

Remember, the absorption rate of Vitamin K2 is improved when consumed with dietary fat due to its fat-soluble nature. So pair these foods with healthy fats for maximum absorption.

Symptoms of Low Vitamin K2

The most common symptom of low Vitamin K2 is an increased risk of osteoporosis or bone fractures, as Vitamin K2 is necessary for proper bone mineralization. Other possible signs of deficiency include:

  • Cardiovascular issues like arterial calcification, or hardening of the arteries
  • Inadequate oral hygiene results in dental issues such as tooth decay and gum disease.
  • Blood sugar imbalances or insulin resistance

If you experience any of these symptoms, it may be worth considering increasing your intake of Vitamin K2 and speaking to your healthcare provider.

The recommended daily intake (RDI) for Vitamin K2 varies based on age and gender. Generally, adult men should aim for at least 120 micrograms per day, while adult women should aim for at least 90 micrograms per day. Pregnant or breastfeeding women may need higher amounts. It’s important to note that Vitamin K2 is not toxic, so taking more than the RDI does not pose a risk of overdose. However, it’s always best to consult with your healthcare provider before making significant changes to your supplement routine.

Is it advisable to take D3 and K2 simultaneously?

While Vitamin D3 and K2 are both essential for bone health, they have different functions in the body. D3 is responsible for helping the body absorb calcium, while K2 helps direct that calcium to where it’s needed – bones and teeth, rather than soft tissues. Taking them together can help optimize their benefits for bone health. However, it’s always best to consult with your healthcare provider before starting any new supplement regimen.

What is the #1 food highest in vitamin K2?

The #1 food highest in Vitamin K2 is natto, a traditional Japanese fermented soybean dish. Other excellent sources include grass-fed dairy products, fatty fish, organ meats, and certain types of cheese. Remember to pair these foods with healthy fats for maximum absorption.


If you struggle to get enough Vitamin K2 through your diet, or if you have a condition that may increase your need for this nutrient. Talk to your healthcare provider about taking a supplement. They can help determine the right dosage and form (such as MK-4 or MK-7) for your specific needs.

Frequently Asked Questions

Q: Can I get enough Vitamin K2 from my diet alone?

A: It’s possible to obtain sufficient Vitamin K2 from your diet if you regularly consume fermented foods, grass-fed dairy products. And other sources mentioned above. However, some people may choose to supplement with Vitamin K2 to ensure they meet their daily needs.

Q: Is there anyone who should avoid taking Vitamin K2 supplements?

A: While Vitamin K2 is generally safe for most people, those on blood-thinning medications may want to consult with their healthcare provider before starting a supplement regimen. Additionally, always check with your doctor before starting any new supplements if you have underlying health conditions or are pregnant or breastfeeding.


Vitamin K2 is a crucial nutrient for maintaining healthy bones, teeth, and blood vessels. It has many benefits, including supporting heart health, reducing cancer risk, and improving insulin sensitivity. You can find Vitamin K2 in a variety of foods. But some people may choose to supplement to ensure they meet their daily needs. Always consult with your healthcare provider before starting any new supplements or making significant changes to your diet.

Hot Topics

Related Articles


This site provides educational information only. It is important not to depend on any content here in place of professional medical advice, diagnosis, or treatment. Similarly, it should not replace professional counseling care, advice, diagnosis, or treatment. If you have any health concerns or questions, always seek guidance from a physician or another healthcare professional.