What is the Difference Between Vitamin K and K2?

Vitamin K is an essential bioactive compound required for optimal body function. It can be present in various isoforms, distinguishable by two main structures: phylloquinone (K1) and menaquinones (K2). The difference between Vitamin K1 and K2 lies in their structure, absorption rates, tissue distribution, and bioavailability. Here are the key differences between Vitamin K1 and K2:

• Sources: Vitamin K1 is primarily found in green leafy vegetables, dairy products, and vegetable oils. In contrast, Vitamin K2 is found in fermented foods, animal products, and some fats.
• Absorption and Transport: Vitamin K2 may be absorbed better by the body and some forms may stay in the blood longer than Vitamin K1. This difference in absorption and transport may cause K1 and K2 to have different effects on health.
• Subtypes: Vitamin K2 has several subtypes called menaquinones (MKs), ranging from MK-4 to MK-13. The exact details of K2 synthesis from bacteria (microbiota) are not yet fully understood.
• Functions: Both Vitamin K1 and K2 are involved in blood clotting, bone health, and possibly heart health. Some research suggests that K2 may be superior to K1 in some of these functions, but further research is needed to confirm this.

Despite their differences, both K1 and K2 can complete the protein activation task. It is essential to ensure an adequate intake of both Vitamin K1 and K2 for optimal health.

Comparative Table: Vitamin K vs K2

Here is a table summarizing the differences between Vitamin K and K2:

Vitamin K1 and K2 are both fat-soluble vitamins with similar chemical structures, but they have different sources and functions in the body. The main differences between Vitamin K and K2 are:

1. Sources: Vitamin K1 is primarily found in plant foods, such as leafy green vegetables, broccoli, and legumes. Vitamin K2, on the other hand, is found in fermented foods and animal products, including egg yolks, liver, and high-fat animal foods.

2. Subtypes: Vitamin K2 has several subtypes called menaquinones (MKs), which range from MK-4 to MK-13. Each subtype has different food sources and functions in the body.

3. Benefits: Both Vitamin K1 and K2 are essential for blood clotting, bone health, and arterial health. However, Vitamin K2 has additional cardiovascular benefits compared to Vitamin K1.

In summary, while Vitamin K1 and K2 share similarities, they have distinct sources, subtypes, and benefits. Incorporating both forms of Vitamin K into your diet can support overall health and well-being.