The Key Differences Between Vitamin K2 and Vitamin K1

Vitamin K is an essential nutrient that plays a crucial role in blood clotting, bone health, and heart health. There are two main forms of vitamin K - vitamin K1 and vitamin K2. While both are important for our overall health, they have distinct differences in terms of their functions and sources.

What is Vitamin K2?

Vitamin K2, also known as menaquinone, is a fat-soluble vitamin that is naturally produced by bacteria in our gut. It is also found in certain animal-based foods such as egg yolks, butter, and organ meats.

However, the most abundant source of vitamin K2 is fermented foods like natto, a traditional Japanese dish made from fermented soybeans. One of the key functions of vitamin K2 is to activate proteins that help transport calcium to our bones and teeth, where it is needed for proper growth and maintenance. This process is essential for maintaining strong bones and preventing conditions like osteoporosis. In addition to its role in bone health, vitamin K2 also plays a crucial role in cardiovascular health. It helps prevent calcium from building up in our arteries, which can lead to heart disease. Studies have shown that individuals with higher levels of vitamin K2 have a lower risk of developing heart disease.

What is Vitamin K1?

Vitamin K1, also known as phylloquinone, is the primary form of vitamin K found in plant-based foods.

It is mainly found in leafy green vegetables such as spinach, kale, and broccoli. Unlike vitamin K2, which is produced by bacteria, plants produce vitamin K1 through photosynthesis. The main function of vitamin K1 is to help with blood clotting. It activates proteins that are responsible for forming blood clots, which are essential for stopping bleeding. This is why individuals who are on blood-thinning medications are advised to limit their intake of vitamin K-rich foods. While vitamin K1 is primarily known for its role in blood clotting, it also has some benefits for bone health.

It helps regulate the production of osteocalcin, a protein that is essential for bone formation and maintenance.

The Key Differences Between Vitamin K2 and Vitamin K1

While both forms of vitamin K have similar functions, there are some key differences between them that make them unique.

Source

The most significant difference between vitamin K2 and vitamin K1 is their source. As mentioned earlier, vitamin K2 is mainly found in animal-based foods and fermented foods, while vitamin K1 is found in plant-based foods. This means that individuals who follow a plant-based diet may have lower levels of vitamin K2 in their body.

Function

Vitamin K2 has a more diverse range of functions compared to vitamin K1. While both play a role in bone health, vitamin K2 also has a significant impact on cardiovascular health. It helps prevent calcium from accumulating in our arteries, which can lead to heart disease.

Vitamin K1, on the other hand, is primarily responsible for blood clotting.

Absorption

Vitamin K2 is better absorbed by our bodies compared to vitamin K1. This is because it is fat-soluble, meaning it needs fat to be absorbed properly. This makes it easier for our bodies to utilize and benefit from vitamin K2 compared to vitamin K1, which is water-soluble.

Storage

Our bodies can store vitamin K2 for longer periods compared to vitamin K1. This is because vitamin K2 is stored in our fat tissues, while vitamin K1 is quickly used up and excreted by our bodies. This means that we need a constant supply of vitamin K1 through our diet, while our bodies can store vitamin K2 for longer periods.

The Bottom Line

Both vitamin K2 and vitamin K1 are essential for our overall health, but they have distinct differences in terms of their functions and sources. While vitamin K1 is mainly responsible for blood clotting, vitamin K2 has a more diverse range of functions, including bone and heart health.

It is important to include both forms of vitamin K in our diet to ensure optimal health. So, whether you prefer leafy greens or fermented foods, make sure to get your daily dose of both vitamin K1 and vitamin K2 for a healthy and balanced diet.