Vitamin K 1 or 2?

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By Dr. Mercola

Vitamin K is a fat-soluble vitamin that is well-known for its role in blood clotting. However, there are two different kinds of vitamin K,1each providing its own set of health benefits. Vitamin K1 is primarily responsible for blood clotting whereas vitamin K2 works synergistically with calcium, magnesium and vitamin D to impart a number of important health benefits, including but not limited to:2

Higher Vitamin K2 Intake Associated With Improved Heart Health

In the video above, Kate Rheaume-Bleue, a naturopathic physician and author of “Vitamin K2 and the Calcium Paradox” discusses the importance of this often-overlooked vitamin, and its synergistic effects with other nutrients. Vitamin K2 deficiency is actually what produces the symptoms of vitamin D toxicity, which includes inappropriate calcification of soft tissues that can lead to atherosclerosis.

A recent article in Life Extension Magazine14 also highlights the cardiovascular benefits of vitamin K2. Importantly, a double-blind, placebo-controlled study15 published in 2015 found that taking 180 micrograms (mcg) per day of vitamin K2 (MK-7 form) for three years improved arterial stiffness in postmenopausal women, especially those who had a high degree of arterial stiffness.

At the end of the study, the treatment group had a 5.8 percent lower stiffness index beta (a parameter of arterial stiffness) and a 3.6 percent lower carotid-femoral pulse wave velocity (a test that measures arterial stiffness). The placebo group, on the other hand, saw a 1.3 and 0.22 percent increase in these measurements respectively.

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This study has been lauded as significant because while previous studies have only been able to show an association,…

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