In sports, there’s always at least one really good player who often gets overlooked and doesn’t get the attention he deserves. This guy is a really talented ball player but for some reason, coach just doesn’t give him the minutes he rightfully deserves and thus grows to be a star that has never truly shined his brightest.
In the world of testosterone boosting, Vitamin K is one of those under appreciated stars; an underdog in every sense of the word. With so little, Vitamin K can potentially do so much which is surprising to me why human research on this vitamin is so limited.
In this review, join me in giving Vitamin K some of the recognition that I believe it’s meant to have. I’ll start with what I believe are some of the best testosterone supplements with Vitamin K in their formulas followed by scientific evidence and my personal thoughts on this manly vitamin.
HONORABLE MENTIONS AND WHY THEY DIDN’T MAKE THE LIST:
- Free Test XRT – This stack uses Vitamin K as MK-4 and gives it a hefty 160 mcg dosage. It grants its user a wide variety of masculine benefits but, as of writing, it’s also about to be taken off the market.
- Anabolic Iron – With 30 mg of Vitamin K as Menaquinone-4, Vitamin D, and Forskolin, this supplement offers decent (not mega) testosterone support. However, it also uses 2 exotic, under-researched ingredients which is why I personally don’t trust it too much.
On that note, the T boosting market is growing rapidly and there are plenty of other testosterone boosters out there that may be more suitable for you, and – surprise, surprise! – some of them don’t even have Vitamin K. To help guide you find this evasive T boosting supplement, I have a list of what I think are the best testosterone supplements this 2018 as well as an archive full of testosterone booster reviews that you might want to check out. That being said, let’s move on.
WHY DO TEST BOOSTER SUPPLEMENTS USE VITAMIN K?
Vitamins are utilized a whole lot in the bodybuilding and male supplement industry. Among the most common and proven to be effective ones are Vitamin D and Vitamin B6. Often left out of the pack though, is Vitamin K which I personally think is a damn shame because it really does hold a lot of promise. Before I answer the lingering question though, allow me to give you an overview as to what Vitamin K is.
What is Vitamin K?
According to this article, Vitamin K is known as “the clotting vitamin” because it is a requirement for our blood to clot but really, Vitamin K isn’t just a single vitamin. It’s a generic name for a group of fat-soluble compounds sharing a common chemical structure of 2-methyl-1,4-naphthoquinone. Among the most common of these said compounds are phylloquinone which is otherwise known as Vitamin K1 found in green leafy vegetables and menaquinones or Vitamin K2.
Speaking in particular about menaquinones, MK-4 and MK-7 have the most research done on them and are also the most common forms used in testosterone boosters being sold at GNC, Amazon, eVitamins, or any other retailer.
Now, to answer the question: why the hell do testosterone boosters use Vitamin K? Well, the answer is simple: because according to a whole lot of rat studies, Vitamin K is involved in the production of testosterone. The manly benefits of Vitamin K don’t stop there though as it’s also shown to be potentially good for our cajones (aka testicles).
I don’t know about you but if it’s anything involving nuts and testosterone (no homo), I’m all fired up. So, without further adieu, let’s get to the researches and find out how Vitamin K can raise our manhood.
STUDIES ON VITAMIN K SUGGEST:
In case you missed it, I highlighted the word “rat” in the previous section. That’s because there really isn’t much human trials done yet on Vitamin K but for what it’s worth, the rat studies really do look good. Anyhow, let’s get to it.
Suppress Testosterone Killing Inflammation
According to this research, “vitamin K deficiency decreases testicular testosterone production in rats” and that Vitamin K suppresses inflammation. Thus, the goal of the research was to study the anti-inflammatory benefits of Vitamin K in terms of testosterone production.
The study was conducted by dividing the rats into two groups of either being fed a Vitamin K free diet or a control group. After 35 days of this diet, the two groups were then administered lipopolysaccharides (LPS) to induce inflammation. Measurements were then taken for comparison. The results are the following:
- No Vitamin K deficiency was found in both groups but rats fed a diet free of Vitamin K had lower levels of the vitamin found in the testis
- Lower levels of testosterone was found in the Vitamin K free group as compared to the control
- LH was unaffected by neither LPS administration or diet
- In the LPS-treated, vitamin K-free diet group, Phosphorylated nuclear factor κB p65 in the testis increased significantly
The study also states that “testicular mRNA and protein levels of Cyp11a, a rate-limiting enzyme in steroidogenesis, corresponded to plasma testosterone levels”. These results indicate that dietary Vitamin K affects the level of Vitamin K found in the testicles and also counters the testosterone depletion caused by inflammation, which might make Vitamin K essential in maintaining healthy levels of testosterone.
Enhance testosterone production
Similar to the previous studies, this research shows Vitamin K’s direct involvement in testosterone production. The difference though, is that while the previous study conducted their research by depriving rats of Vitamin K, this one had non-deficient rat subjects supplement with this potentially manly vitamin.
The goal of this research was to investigate the function of Vitamin K in the testis and to analyze its role in steroidogenesis. The researchers went about their investigation by supplementing rats with 75 mg/kg of MK-4, one of the predominant forms of Vitamin K2 in the testis, for 5 weeks. Testosterone and cellular protein was then analyzed and they ended up with these results:
- Increased testosterone
- No difference in LH
As you can see, these results mesh well with the results of the previous study. Moreover, this research also shows a link between Vitamin K and CYP11A (in addition to PKA) saying that these enzymes “were all stimulated in the presence of MK-4”.
Something worth notable on this research alone though, is that it also says that testosterone levels were elevated by Vitamin K2 (MK-4) and not by K1. To conclude, the research suggests that “MK-4 may be involved in steroidogenesis in the testis, and its supplementation could reverse the down regulation of testosterone production in elders”.
Promote prostate health
A research entitled “Vitamin K: The Missing Link To Prostate Health“, demonstrates that subclinical varicoceles are more common than generally realized. The varicocele causes a back flow of blood from the testes to the prostate gland, leading to an increase in testosterone amounting to over 130 times in the veins near the prostate. This prostate hyperactivity could lead to severe problems such as benign prostate hyperplasia (BPH) when we men get older.
According to the research, the cause of varicocele is because of Vitamin K deficiency. Simply said, Vitamin K plays a role in the calcification of varicose veins which could hypothetically mean that poor prostate health is a direct impact of Vitamin K deficiency.
Also in the research, it is stated that “by providing vitamin K in the right form and quantity, along with other supporting nutrients and phytochemicals, it is likely that excellent prostate health can be extended much longer, and perhaps poor prostate health can be reversed“.
How Do I Take VITAMIN K?
First of all, when we talk about Vitamin K, there are literally thousands of forms that we can choose from. However, the most common are Vitamin K1 (phylloquinone) and K2 (menaquinone). Of these two forms, K1 is what we usually get in our diets because it’s more prevalent in green leafy vegetables.
When it comes to testosterone boosting though, this is a real shame because Vitamin K2 is the better choice. Moreover, Vitamin K2 comes in multiple forms as well.
- MK-4 – Personally, I’d say this is the best form of Vitamin K2 for testosterone. Aside from being the most popular form, it also acts independently from the Vitamin K cycle
- MK-7 – Because it flows within the Vitamin K cycle, it is also more bioavailable and stays in the body longer. If you’re after the other effects of Vitamin K aside from testosterone, this is the way to go.
- MK-8 and MK-9 – Also available but are rarely used
Strictly in terms of testosterone boosting, I’d suggest using MK-4 because it’s the form that’s scientifically shown to boost testosterone. Now, I haven’t seen any research saying that MK-7 doesn’t work. As I’ve said, it’s also more bioavailable so it could be a legitimate option, too. However, I also haven’t seen any evidence on it being able to boost testosterone so to be sure, I’d go with MK-4.
In terms of dosage, I really can’t say how much you should be taking because the research surrounding Vitamin K is almost entirely based on rats. I did see a study suggesting that as low as 1500 mcg can be effective so you should fine starting there. If I were to give you a range though, I’d say somewhere between 1500 mcg and 45 mg per day.
Recap: Best Testosterone Supplements with Vitamin K
|T-Booster Supplement||My Review||Website|
|#1 – Prime Male||My Review||www.primemale.com|
|#2 – TestoFuel||My Review||www.testofuel.com|
|#3 – Performance Lab Whole-Food Multi||My Review||www.performancelab.com|
|#4 – TestoTEK||My Review||www.teknaturals.com|
Most of the information we currently have on Vitamin K resides on animal (rat) research but they really do look very promising. To me, this is actually very staggering considering the amount of positive research it has on the hormonal levels of male rats.
In the future, when a group of researchers finally decides on testing this potentially masculine vitamin on humans, I would expect it to be right up there with Vitamin D, Vitamin B6, and Vitamin B12. If you do find Vitamin K on your testosterone boosting supplement, do consider the amount of potential you have in your stack. Until it has strong human evidence to back it up though, it will remain a hypothetically potent testosterone boosting vitamin.