Heart palpitations as a result of vitamin K2 supplementation


Ellie says, “Vitamin K2, MK-4 and MK-7, might
have caused prolonged heart palpitations. Upon stopping it, symptoms mostly resolved
after a week or so. Does that mean that the body is better off
without it? Might increasing calcium intake mitigate this?” And then there’s a link. Okay, I can’t look at the link now because
the number of questions in the Q&A goes up, not down, over time. So, I would say, the calcium is really interesting. I genuinely hadn’t thought of that until you
mentioned it. Even though I’ve heard other people ask this
question, I haven’t had time to look into it, but you raise a good point. So, it is conceivable, for example, that your
bone density has been very low because you have not had the K2 you needed to get the
minerals into the bone. And so when you get the K2, you start loading
the calcium into the bone, but maybe because your whole body is programmed to assume things
were the way they were before you started taking the K2, then it doesn’t adapt fast
enough to normalize your blood calcium, which, by the way, how do you normalize your blood
calcium? You take calcium out of the bone. So, if you have something making calcium go
into the bone—oh, by the way, it’s dependent on the dose, right? So, MK-4 has been studied in high-milligram
doses as an osteoporosis drug because it inhibits bone resorption. If you inhibit bone resorption, you will definitely
interfere with your ability to maintain normal serum calcium levels because bone resorption
is how you do that. So, either you’re giving the nutrients needed
to get the calcium into the bone and the body is just prioritizing that because it’s been
missing them for so long, and your serum calcium drops, or you’re actually creating signaling
stopping bone resorption, and so your blood calcium drops because of that. Either way, taking calcium might impact that,
and I would love to have some anecdotal data on that because there’s no studies on K2and
heart palpitations. There’s just a bunch of anecdotes. So, I would love it if we have some anecdotes
of people saying whether the calcium helps, especially since so much of the K2 stuff is
so skeptical of calcium. Kate Rheaume-Bleue’s book Vitamin K2 and the
Calcium Paradox, I think it’s a great book. Basically, what that book is, is an enormous
elaboration of my 2007 article on Activator X and Weston Price. But if I had written that book, I would have
done things a little bit differently. I think the whole idea of the calcium paradox
that’s in the title is, I think it has merit. There is some data indicating that calcium
supplements might worsen the risk of heart disease, but I think that the conclusions
are a little—I think they’re way too anti-calcium, and I think there’s too many people out there
taking K2 who have it in their heads that calcium supplements are bad, and look, calcium
supplements are bad compared to getting enough calcium from food. A huge portion of those people are not getting
enough calcium from food, and getting calcium is more important than where it comes from. I genuinely believe that.

14 thoughts on “Heart palpitations as a result of vitamin K2 supplementation”

  1. Vitamin K2 mk7 is the cause of this problem because it stays in blood for a very long time and thickens the blood! heaps of people are having this problem with k2 in mk7 form you should take Vitamin K2 in MK4 version if you have this issue with mk7 as MK4 gets cleared out of the blood much quicker as its the animal version of K2.

  2. I have been taking high dose K2 as Mk4 and Mk7 for aortic valve stenosis. For two year the stenosis has not progressed, but has not reversed either. I am also experiencing a lot of heart palpitations recently since upping my dose of two different K products to 200mcg of K2 with Mk7 (doctors best) and also increased another K2 product called Relentless Improvement to 45,000mcg Mk4 (menatetrenone)and 180mcg Mk7 as menaquinone. Could I unknowingly be doing harm? I also take 20,000IU's per day of D3 to keep 5 hydroxy D levels around 60-70

  3. I eat natto every day and have for eight months. I eat at least 50-100 grams per day. I eat a lot of greens as well. No heart palpitations at age 68. My one change noted after beginning this high “dose” of mk7 is a remark from my dental hygienist that my gums did not bleed at all when she cleaned my teeth for the first time after being on natto for several months.

  4. Wow this is interesting! I get a reduction in my heart palpitations when I take B12 sublingual even despite having normal or high B12 levels in my blood. Does B12 have anything to do with calcium levels? I take K2 with my D3 and haven't noticed it affects them. Off to google…

  5. I get heart palpitations every time I take calcium. If I take calcium gluconate- 500mg twice daily for 2 days I will also start having trouble sleeping. I also get heart palps when I take vitD3/K2. I don't know if my heart palps after taking calcium or D3/K2 could be the result of too much calcium. I found this article https://www.medicalnewstoday.com/articles/271427.php#1
    "While many factors contribute to the development of heart arrhythmias, including genetics, scientists know that one mechanism is calcium overload in the heart. This disrupts the finely controlled electrical activity that governs contraction of heart muscle."
    I don't know if this could be relevant to K2 supplementation though.

  6. Interesting. Would upping D3, calcium, magnesium intake help this?

    I have been using 360ug K2 for the past 6 months and feel amazing and have signs of less calcium in my lungs from long term lung damage. I am optimistic that my arterial calcification will be reduced.

  7. Like somebody else said, what about magnesium as the person didn’t say if they were taking a magnesium supplement or not and if yes how much ?

  8. I had heart palpitations in the past from electrolyte imbalance doing long fasts, which sea salt fixed, but never from taking vitamin K2. I take 5mg of mk4, but also get enough D3 and retinol, plus consume lots of raw "at home" and some pasteurised "at work for coffee" dairy. So maybe the calcium in the dairy is helping to prevent this, I don't know, this is my N of one.

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