Vitamin K2: A Valentine’s message for heart and bones
This Valentine’s Day, when you’re thinking about what’s closest to your heart, keep your bones in mind too with vitamin k2
If you’re a regular reader of my blog, you already know how important vitamin K is to bone health — but you may not realize its importance in cardiovascular health. It’s a key nutrient in blood coagulation, of course, but that’s far from its only role.
Why your heart and bones love vitamin K
Vitamin K has a special relationship to both heart and bone health through its contribution to the metabolism of calcium. Here’s a closer look why:
- Vitamin K has the unique capacity to activate proteins that help to keep calcium in the bone and out of the arteries (which prevents arterial calcification), and to regulate inflammation.
- Its importance is underscored by several studies that show that people who took a form of vitamin K2 called menaquinone (MK-7) had a reduced risk of coronary calcification and heart disease.
- Even in patients with kidney disease, who are at risk of atherosclerosis and heart disease, small doses of MK-7 and vitamin D helped slow the progression of the disease.
Source: NattoPharma, “Calcium Perfected”, n.d.
Researchers have known there’s a link between osteoporosis and heart disease for a while now. It’s so significant that some researchers think that if patients are diagnosed with heart disease, they should be evaluated for osteoporosis — and vice versa.
Top foods for getting vitamin K
You can eat good quality, lean meats, organic eggs, and hard or soft cheeses knowing they can supply you with some of the vitamin K2 your bones need. But before you rush out to buy kale and leafy greens, you should know that vitamin K2, unlike vitamin K1, is not found in vegetables.
Natto is fermented soybeans and an excellent source of the MK-7 form of vitamin K2. Fermented vegetables like sauerkraut and seaweed are also pretty good sources of vitamin K2. If you follow a vegetarian or vegan way of eating, consider supplementing with vitamin K2 to ensure that your heart and bones have this important nutrient.
Beulens JW, Bots ML, et al. High dietary menaquinone intake is associated with reduced coronary calcification. Atherosclerosis. 2009 Apr;203(2):489–493.
Geleijnse JM, Vermeer C, et al. Dietary intake of menaquinone is associated with a reduced risk of coronary heart disease: The Rotterdam Study. J Nutr. 2004;134(11):3100-3105.
Harshman SG, and Shea MK. The role of vitamin K in chronic aging diseases: Inflammation, cardiovascular disease, and osteoarthritis. Curr Nutr Rep. 2016;5(2):90-98.
Kurnatowska I, Grzelak P, et al. Effect of vitamin K2 on progression of atherosclerosis and vascular calcification in nondialyzed patients with chronic kidney disease stages 3-5. Pol Arch Med Wewn. 2015;125(9):631-640.
Shea MK, and Holden RM. Vitamin K status and vascular calcification: Evidence from observational and clinical studies. Adv Nutr. 2012;3(2):158-165. doi: 10.3945/an.111.001644.
I’m Dr. Susan Brown. I am a clinical nutritionist, medical anthropologist, writer, and motivational speaker. Learn my time-tested 6 step natural approach to bone health in my online courses.