Vitamin K2

Vitamin K2 for Dogs

Vitamin K2 is a fat-soluble vitamin that plays a key role in a dog’s bone strength, joint flexibility, heart health, and overall well-being. It helps the body properly use calcium—guiding it into bones and teeth where it strengthens skeletal structure, while keeping it away from areas where excess calcium can cause problems, like arteries, cartilage, and soft tissues.

There are two natural forms of Vitamin K: Vitamin K1 (phylloquinone) and Vitamin K2 (menaquinones). K1 is mostly involved in blood clotting, while K2 supports calcium metabolism and helps maintain long-term skeletal and cardiovascular health.

Vitamin K2 comes in different forms, the most important being:

• MK-4, found in animal-based foods like meat, eggs, and dairy, which is quickly absorbed and used in tissues like bones and arteries.
• MK-7, found in fermented foods like certain cheeses and natto, which stays active in the body longer and plays a role in vascular health.

As dogs grow and age, their bodies naturally produce K-dependent proteins—some of which help regulate calcium, while others can contribute to inflammation, bone loss, and hardened arteries if not properly controlled. Vitamin K2 helps ensure these proteins function correctly, directing calcium where it’s needed and keeping soft tissues flexible.

Since a dog’s diet largely determines its intake of Vitamin K2, pet parents interested in supporting strong bones, flexible joints, and heart health may want to consider whether their dog’s food provides adequate levels. Vitamin K2 works alongside other nutrients like Vitamin D and calcium to help maintain a balanced approach to skeletal and cardiovascular wellness.

Why Do Dogs Need Vitamin K2?

• Supports Strong Bones – Helps calcium build healthy bones while preventing bone loss.
• Protects Joint & Soft Tissue Health – Prevents excess calcium buildup in cartilage, arteries, and organs.
• Helps the Body Regulate Calcium – Ensures calcium is used efficiently for long-term health.
• Maintains Heart Health – Supports proper blood vessel function and circulation.

How K2 Differs from K1

Vitamin K1 (found in leafy greens) primarily supports blood clotting, while K2 plays a broader role in calcium metabolism and long-term skeletal health. Since dogs don’t convert K1 to K2 very efficiently, their primary sources of K2 come from animal-based foods like organ meats, egg yolks, and fermented foods.