Out of thirteen different subtypes of vitamin K-2 that have been identified, menaquinone-7 has shown great promise for promoting bone strength and cardiovascular health, thanks to its role in regulating calcium transport.
We all need a good supply of vitamin K to stay healthy, but it's important to remember that not all vitamin K is the same. In fact, vitamin K is actually a group of several related compounds, classified into two main types, K-1 and K-2. Vitamin K-1 is often called the "plant form" of the vitamin, as it is found primarily in green leafy vegetables. Vitamin K-2 (menaquinone) is the main storage form of the vitamin in animals, and is the most biologically active form in human physiology.
Menaquinone-7 stimulates the activity of bone-building osteoblasts, which draw calcium into the bones, and inhibits the action of osteoclasts, which draw calcium from the bones and release it into the bloodstream. This can benefit both the skeletal and cardiovascular systems by keeping calcium out of the arteries and getting it to the bones that need it.
Menaquinone-7 is found naturally in many foods, including aged cheeses, liver and eggs, but the richest source by far is natto, a traditional Japanese food made from fermented soybeans. Swanson Ultra Maximum Strength Natural Vitamin K2 is our highest potency K-2 supplement ever, derived from natto made from exclusively from non-GMO soybeans.