alwaysfirst
Banned
I went with MK4 because it's the version used in studies showing increased testosterone.
What do you think about a mix of the 2, pointless or better?
I went with MK4 because it's the version used in studies showing increased testosterone.
This is from the Editor's Thoughts on examine.com:What do you think about a mix of the 2, pointless or better?
I'm really liking vitamin K, and would recommend that it be taken unless there is an obvious reason not to (ie. you are on Warfarin). I see nothing wrong with just taking 500mcg of both phylloquinone (vitamin K1) and MK-7, since MK-7 seems to be the most common long chain quinone (and better than MK-4 at the same stuff) but may not convert into phylloquinone or MK-4, so the additional phylloquinone covers your bases for any possible unforeseen things that MK-7 may not be able to cover.
This is from the Editor's Thoughts on examine.com:
I haven't really read it through recently. I remember seeing something about them recommending both, and just posted it up. I'll read through it, as well as that page in general and report back.So MK7>MK4 or did I read that wrong?
For its unique properties, MK-4 appears to induce differentiation of leukemic cells (a property useful in differentiation therapy[128]) potently at 1µM, which is not observed with phylloquinone.[129] It has been speculated[130][131] that MK-4 has a direct action independent of the vitamin K cycle either through proteins (direct binding rather than carboxylation) or acting upon a receptor. There are also differences in transportation and distribution between menaquinones and phylloquinone (elaborated on in the pharmacology section), which can be summed up with menaquinones being better partitioned to the periphery and not the liver, and MK-4 appears to have a unique role on osteoclasts that is not seen with phylloquinone or MK-7 (and perhaps underlies why superloading of MK-4 is used rather than other menaquinone sources).
MK-4 (Menatetrenone) does not appear to increase the amount of active vitamin K in the body, although still appears to be active in carboxylating proteins. It requires higher dosages than phylloquinone, and although 45mg (a very high pharmacological dose) is used it is possible that 1,500mcg is also effective. MK-4 may have a unique role on inducing bone growth that is not seen with phylloquinone or MK-7
When comparing MK-7 against MK-4, the efficacy of long chain menaquinones such as MK-7 on blood clotting seem to exceed that of phylloquinone and MK-4[132][135][136], which is thought to be due to the prolonged half-life relative to other forms of Vitamin K.
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Lacks relevance to what? Not your claim that
The study doesn't address testosterone, but it does suggest evidence for physiological effects from oral MK-4 (meaning it's bioavailable enough to have an effect).
I haven't really read it through recently. I remember seeing something about them recommending both, and just posted it up. I'll read through it, as well as that page in general and report back.
Edit: Interesting excerpts from their page on Vitamin K (bold added by me for emphasis):
When comparing MK-7 against MK-4, the efficacy of long chain menaquinones such as MK-7 on blood clotting seem to exceed that of phylloquinone and MK-4[132][135][136], which is thought to be due to the prolonged half-life relative to other forms of Vitamin K.
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Interesting info about bone growth from MK4. I haven't noticed anything yet, but I will keep paying attention.
The real question is whether MK7 increases test the way MK4 does in rats.
Yeah, the dose that was used in the rat studies was far more than the dose(s) that people use. With that said, it's possible that it still does something, as lower doses have been shown to do something in various aspects, and it may be able to do some things that MK-7 can't. Is increasing testosterone one? I don't know. Perhaps it can at reasonable doses, perhaps MK-7 can as well. Perhaps MK-4 is better than MK-7 here. I really don't know. Has anyone seen any studies regarding Vitamin K and testosterone in humans? It appears that most research (basically everything I've seen) regarding Vitamin K and testosterone used MK-4 though.I haven't really read it through recently. I remember seeing something about them recommending both, and just posted it up. I'll read through it, as well as that page in general and report back.
Edit: Interesting excerpts from their page on Vitamin K (bold added by me for emphasis):
Interesting info about bone growth from MK4. I haven't noticed anything yet, but I will keep paying attention.
The real question is whether MK7 increases test the way MK4 does in rats.
Here's some info from a rat study:
Invalid Link RemovedThe mRNA levels of Cyp11a - a rate-limiting enzyme in testosterone synthesis - positively correlated with the menaquinone-4 (MK-4) concentration in the testis. Moreover, as compared to the control (Cont) and K-supplemented (K-sup) groups, the K-def group had decreased testosterone concentrations in the plasma and testis. These results suggested that K is involved in steroid production in the testis through the regulation of Cyp11a.
That may be true with the clomid but for a lot of people the sides are not worth the increase in TThanks for posting an update. i too have tried K2 and ran bloodwork. As with other test boosters no test increase of any significance observed. Levels remained at my constant baseline which is the lower end of the test scale. I am hypogonodal too although not AAS induced. TBH i suspect K2/ along with 98% of test boosters, just doesnt work period. By way of comparison virtually everyone responds to Clomid testwise regardless of any underlying conditions
That may be true with the clomid but for a lot of people the sides are not worth the increase in T
That may be true with the clomid but for a lot of people the sides are not worth the increase in T
I been using this:
h**p://catalog.designsforhealth.com/Emulsi-D3-Synergy-2oz-liquid
Its best to mix K2 with D3
i take D3 on a daily basis for its wider health benefits and coingested with K2. Are you speculating or do you have bloodwork that indicates this combo worked for you to increase your test? Sure did zilch for me test-wise.
Good post OP. Based on the studies, I will probably be picking up some K2-MK4 up to try as well. Will be getting the Carlson brand as it is one of 2 brands available at the store where I shop for my general health staples.
Interested in this for general health/wellness, bone building and helping to increase Vit D absorption as I don't get much sun and test low for vit D.Did you read OPs recent update relating to bloodwork and mine? If it's test boosting you're after dont waste your money. if its joint / arthritis related don't waste your money either, Studies very rarely consistently translate to real-world improvements in the supp world except in few cases eg creatine and protein