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Can you overdose on vitamin K2?

by (367)
Updated about 23 hours ago
Created June 27, 2012 at 2:51 PM

There are a couple of similar (but not the same) questions in the archives on this and it seems unlikely that anyone would overdose on K2 but if I take the Life Extension Super K supplement plus high vitamin butter oil (half a teaspoon) plus eat some, though not masses, of pastured butter and a couple of egg yolks every day, am I getting too much?

It seems those with bad bones (I've got mild osteoporosis) might need more in any case and as with all things I've no idea how much I'm absorbing if I've got gut issues (though my last iron level was top of the range so I'm obviously absorbing that fine!) I take D3, FCLO and magnesium so should I take both supplement and butter oil or will the butter oil alone be enough? Just want to cover all bases as I'm never sure with Green Pastures products, good as they are, exactly what the vitamin content is as they are a food not a supplement.

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839 · June 28, 2012 at 5:21 PM

I don't think you can honestly compare FCLO/HVBO to Thorne D3/K2... the Thorne product might be cheaper, but the FCLO/HVBO products are more bio-available to your body and include many other supporting nutrients (Vit A, Omega 3's, Quinone's, Omega 6/7/9, CLA, etc...). After all, a supplement is only as good as the portion you absorb, and the additional nutrients in combination with D3/K2 increase this further...

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1017 · June 28, 2012 at 12:21 AM

My experience was that it's not magical enough to be worth the price. Thorne brand D3/K2 gave me the same results, and I was much better able to manage how much I was taking.

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4359 · June 27, 2012 at 7:44 PM

Yes, but that just means one has not been established yet.

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4991 · June 27, 2012 at 5:09 PM

Fascinated by your thoughts on K1 / alcohol. I've been taking the Life Extensions super K for a few weeks and I have noticed that wine seems to hit me more than it did. I hadn't linked the two though - I shall try to keep more of an eye on this. Thanks!

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367 · June 27, 2012 at 3:42 PM

Thanks, August, that's really helpful. I haven't actually ordered the Life Extension supplement yet but I don't think I will if it makes you feel weird! I just went into a panic about whether I was getting enough with just the butter oil/fclo blend - I seem fine, skin's good etc but as you say it's a hefty price tag and is it enough? Maybe I'll try the Thorne drops over the winter when I probably get less in my diet and hope for the best. All very boring trying to work it out but I need to get the right mix for my pathetic, crumbling bones!

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367 · June 27, 2012 at 3:39 PM

Thanks, August, that's really helpful, I haven't actually ordered the Life Extension supplement yet, I went into a bit of a panic about whether I was getting enough, but I don't think I will if it makes you feel weird! I seem fine, skin is good etc on just the butter oil/fclo blend, but as you say the price tag is hefty and is it enough?! Maybe I'll try some pure K2 drops although the only ones I've seen that deliver in the UK from Thornes are D3 and K2. It's really boring having to work it out but I need to make sure I've got enough for my pathetic bones!

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4 Answers

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11204 · June 27, 2012 at 3:13 PM

I was taking Carlsons 5mg for a long time, and for a little while I took 10mg. Stopped that because I was worried, same as you, but I didn't have any sort of bad reactions. Right now I am doing the Green Pastures butter oil/fclo mix. I don't know how much K2 there really is in it, but my skin still looks good. I've also got some of the Thorne Research drops, but I haven't been using them much because I wanted to see that Green Pastures magic happen. Not sure that it is magical enough to be worth the price, though.

Anyway, there are people taking 15mg and up. There isn't a known limit. I would suspect there has to be an upper limit somewhere, but I can tell you you are not going to hit the upper limit with what you are doing. What might happen though, is you might find the K1 in the Life Extension supplement makes you feel funny. K1 makes my teeth feel weird, makes drinking alcohol extremely uncomfortable, and gives me this strange wired feeling- even mixed in as a complex. I'm pretty sure I've tried this Life Extension product and I felt those symptoms- the same symptoms I got back when I didn't know any better and got a pure K1 supplement rather than one with K2 in it.

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4991 · June 27, 2012 at 5:09 PM

Fascinated by your thoughts on K1 / alcohol. I've been taking the Life Extensions super K for a few weeks and I have noticed that wine seems to hit me more than it did. I hadn't linked the two though - I shall try to keep more of an eye on this. Thanks!

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1017 · June 28, 2012 at 12:21 AM

My experience was that it's not magical enough to be worth the price. Thorne brand D3/K2 gave me the same results, and I was much better able to manage how much I was taking.

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367 · June 27, 2012 at 3:39 PM

Thanks, August, that's really helpful, I haven't actually ordered the Life Extension supplement yet, I went into a bit of a panic about whether I was getting enough, but I don't think I will if it makes you feel weird! I seem fine, skin is good etc on just the butter oil/fclo blend, but as you say the price tag is hefty and is it enough?! Maybe I'll try some pure K2 drops although the only ones I've seen that deliver in the UK from Thornes are D3 and K2. It's really boring having to work it out but I need to make sure I've got enough for my pathetic bones!

F92a0a13e601a6d302e44a4d4e0e3b91
367 · June 27, 2012 at 3:42 PM

Thanks, August, that's really helpful. I haven't actually ordered the Life Extension supplement yet but I don't think I will if it makes you feel weird! I just went into a panic about whether I was getting enough with just the butter oil/fclo blend - I seem fine, skin's good etc but as you say it's a hefty price tag and is it enough? Maybe I'll try the Thorne drops over the winter when I probably get less in my diet and hope for the best. All very boring trying to work it out but I need to get the right mix for my pathetic, crumbling bones!

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839 · June 28, 2012 at 5:21 PM

I don't think you can honestly compare FCLO/HVBO to Thorne D3/K2... the Thorne product might be cheaper, but the FCLO/HVBO products are more bio-available to your body and include many other supporting nutrients (Vit A, Omega 3's, Quinone's, Omega 6/7/9, CLA, etc...). After all, a supplement is only as good as the portion you absorb, and the additional nutrients in combination with D3/K2 increase this further...

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-4 · July 01, 2012 at 3:05 AM

Do you have any scientific evidence to support that CLO/HVBO products are more bio-available to your body? I think that the CLO/HVBO is rancid, nutritionally damaged product and taste bad. I stopped taking it.

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1017 · June 28, 2012 at 12:20 AM

I don't know if it was just a coincidence, but I regularly take around 1mg a day and ended up taking 5mg one day. For some reason I was extremely dizzy all day, to the point where walking around I sometimes wondered if I might fall over. I dropped the dose and felt normal again. Maybe it was something else and all a coincidence, or maybe I 'overdosed'.

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259 · June 27, 2012 at 6:09 PM

There is no established Upper Level of vitamin K. It is generally considered safe. The only contraindication is taking large doses while on blood thinners, as it reduces their effectiveness.

Over and out.

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4359 · June 27, 2012 at 7:44 PM

Yes, but that just means one has not been established yet.

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