Vitamin K

Ingredient Library

Vitamin K

Discover why vitamin K is essential and why the form of vitamin K matters in modern food supplements.

Vitamin K is an essential fat-soluble vitamin that contributes to the maintenance of normal bones and normal blood clotting. It exists in several different forms, each with unique characteristics and natural food sources.

In our formulas, we use vitamin K2 as MK-7, a form commonly used in premium food supplements and often paired with vitamin D3.

The Basics

Understanding Vitamin K

Vitamin K

Vitamin K is an essential fat-soluble vitamin that contributes to normal blood clotting and the maintenance of normal bones. It naturally occurs in several forms, with vitamin K1 and vitamin K2 being the most important in human nutrition.

Vitamin K1 & Vitamin K2

Vitamin K1 (phylloquinone) is found mainly in green leafy vegetables such as spinach and kale. Vitamin K2 (menaquinone) is found in fermented foods and certain animal-derived foods, and is available in several forms, including MK-4 and MK-7, which differ in their chemical structure.

Vitamin K2 (MK-7)

MK-7 is one of the best-known forms of vitamin K2 and is commonly used in premium food supplements. It is the form we use throughout our formulas and is frequently combined with vitamin D3 because both nutrients contribute to the maintenance of normal bones.

Key Benefits

Why It’s Used

Bones & Joints

Supports healthy joints, comfort and everyday mobility.

Heart Health

Supports normal cardiovascular health and circulation.

Muscle Function

Supports normal muscle function and physical performance.

Healthy Inflammatory Response

Supports the body's normal inflammatory response.

Common Questions

Frequently Asked Questions

What is the difference between vitamin K1 and vitamin K2?

Vitamin K1 is found mainly in green leafy vegetables, while vitamin K2 is found in fermented foods and exists in several forms, including MK-4 and MK-7. Both contribute to normal blood clotting, while vitamin K2 is commonly used in food supplements.

What does MK-7 mean?

MK-7 is a naturally occurring form of vitamin K2 known as menaquinone-7. It is widely used in premium food supplements and is the form used throughout Strength & Spices formulas.

Why do you use MK-7 instead of MK-4?

Vitamin K2 is available in several forms, including MK-4 and MK-7. We use MK-7 because it is a well-established form commonly selected for premium food supplements and works well alongside vitamin D3 in our formulations.

What foods naturally contain vitamin K?

Vitamin K1 is naturally found in leafy green vegetables such as spinach, kale and broccoli. Vitamin K2 is found in fermented foods such as natto and certain cheeses.

Why is vitamin K2 often combined with vitamin D3?

Vitamin D3 and vitamin K2 are frequently paired because they both contribute to the maintenance of normal bones and complement one another in nutritional formulations.