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Vitamin K often doesn’t get the spotlight it deserves when discussing vitamins essential for our health. Yet, it plays a crucial role in maintaining our health, particularly in bone health and calcium management. Let’s delve into why Vitamin K is indispensable and how you can ensure you get enough of this vital nutrient.

Understanding Vitamin K

Vitamin K is a fat-soluble vitamin primarily known for its role in blood clotting. It comes in two main forms: Vitamin K1 (phylloquinone), found in plant foods, and Vitamin K2 (menaquinone), found in animal products and fermented foods. Both forms are essential, but Vitamin K2 is particularly noted for its benefits in bone and cardiovascular health.

The Role of Vitamin K in Bone Health

Our bones are dynamic tissues that constantly undergo remodelling, a process of resorption (breakdown) and formation. For this delicate balance to be maintained, Vitamin K plays a pivotal role:

  1. Activation of Osteocalcin: Osteocalcin is a protein produced by osteoblasts (bone-forming cells) and is essential for binding calcium to the bone matrix. Vitamin K is necessary for the carboxylation of osteocalcin, enabling it to bind calcium effectively and thus strengthen bones.
  2. Regulation of Bone Mineralization: Vitamin K helps regulate calcium deposition, ensuring calcium is utilized in the bones and teeth rather than in the arteries and other soft tissues. This not only supports bone density but also prevents arterial calcification.
  3. Reduction of Fracture Risk: Studies have shown that adequate intake of Vitamin K2 can reduce the risk of bone fractures, particularly in postmenopausal women at higher risk of osteoporosis.

Vitamin K and Calcium Management

Calcium is crucial for various bodily functions, including muscle contraction, nerve transmission, and blood clotting. However, its role in bone health is paramount. Vitamin K ensures calcium is deposited in the bones rather than the arteries. Without adequate Vitamin K, calcium might end up in the wrong places, weakening bones and potentially leading to cardiovascular issues.

Sources of Vitamin K

Ensuring adequate intake of Vitamin K is vital for its health benefits. Here’s where you can find it:

  • Vitamin K1:
    • Leafy green vegetables like spinach, kale, and broccoli.
    • Other vegetables such as Brussels sprouts and cabbage.
    • Some fruits, including blueberries and grapes.
  • Vitamin K2:
    • Animal products such as liver, chicken, and eggs.
    • Fermented foods like natto (a traditional Japanese food made from soybeans), cheese, and sauerkraut.

Incorporating various foods into one’s diet is a practical approach for individuals looking to boost their Vitamin K intake. Supplements might be an alternative for those with dietary restrictions or specific health concerns, but it’s always best to consult a healthcare professional before starting any new supplement regimen.

Additional Information on Vitamin K

  • Interaction with Medications: Vitamin K can interact with certain medications, particularly blood thinners like warfarin. If you’re on such medicines, it’s crucial to maintain consistent Vitamin K intake and consult your doctor for appropriate dietary guidance.
  • Recommended Intake: The recommended daily intake of Vitamin K varies by age and gender. For adult men, it’s about 120 micrograms per day; for women, it’s 90 micrograms. However, these recommendations can vary based on individual health conditions and dietary habits.
  • Bone Health Beyond Vitamin K: While Vitamin K is vital, it’s important to remember that bone health is multifaceted. Adequate intake of other nutrients like calcium, Vitamin D, and magnesium and regular physical activity, particularly weight-bearing exercises, are critical for maintaining strong and healthy bones.


Vitamin K, though often overlooked, is a cornerstone of bone health and effective calcium management. By ensuring a diet rich in both forms of Vitamin K, we can support our bones, prevent fractures, and maintain overall health. As we strive to improve our health literacy and advocate for better bone health, let’s give Vitamin K the recognition it deserves and ensure it’s a staple in our diets.

For more information on bone health and other related topics, visit the London Osteoporosis Clinic.

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