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Chemical Name: (17-alpha,20E) 17,20-[(1-methoxyethylidene)bis(oxy)] 3-oxo-19-norpregna-4,20-diene 21-carboxylic acid methyl ester
Half Life: 18-24 hours

SARMS or selective androgen receptor modulators are well-known for giving the same muscle growth results as anabolic steroids but without the negative side effects that comes with the latter. Japanese scientists are doing an experiment on a new SARM known as YK11 which is said to be the strongest among them all.

YK11 is believed to be a SARM and produce the effect of myostatin at the same time.

Here’s what we know as of today…

How YK11 Works

In 2011, Yuichiro Kanno of Toho University published the results of an initial study on YK11, confirming that the rare compound was a SARM. However, most people are now considering it to be what’s called a Myostatin Inhibitor.

YK11 attaches itself to the AR (androgen receptor), and modulates specific muscle receptors while being able to eliminate the traditional effects of steroids.

Most SARMS have limited androgenic side effects, but also lesser anabolic effect when compared to testosterone.

However, that’s not the case with YK 11 according to the Biological and Pharmaceutical Bulletin in 2013. When Kanno used C2C12 muscle cells to test the effects of the SARM, it was found that the muscle cells produce more anabolic factors if exposed to 500 nmol (nanomoles) YK11 than if you expose the same muscle cells to 500 nmol DHT.

YK11 induces muscle cells to make even more follistatin than DHT does (a strong myostatin inhibitor). By working through the androgen receptor, YK 11 is able to product effects just as powerful as testosterone.

Where to Buy YK 11 Online

If you want to use this SARM for yourself, there are many places you can buy both the liquid and capsulated versions of YK 11.

For an excellent capsulated version, the YK-11 by Medfit RX is a total winner. The lowest price and fastest shipping we found were at Powersupps UK.


Buy YK-11 Online at Powersupps UK

For the best and highest quality LIQUID YK-11, you won’t find a better supplier than It stands for Innovative Research Compounds and it’s the #1 recommended spot on reddit for all your SARM needs.

Dosing Guidelines

Most people recommend between 2 and 5 mg, twice per day. As anything else, always start low to assess tolerance and build your way up.

YK 11 is a powerful SARM that shouldn’t be taken lightly. However, even at 30mg people have reportedly felt little to no side effects.


YK11 shows a lot of promise as a very powerful muscle building SARM. It’s one of the newer SARMs currently undergoing research, but it looks incredibly promising.

As a myostatin inhibitor, it will also be amazing when combined with other SARMs. The only downside as people have mentioned are the fact that it’s never been done on human or animal trials at this point.

There’s still a lot to be learned, so our opinion on this SARM will change as more research develops.

If you’re tried it yourself, let me know in the comments below what you think as well!

  1. Steve Watkins says

    hello, my name is steve watkins. I am an american that has now lived for 10 years in Mexico. I import a variety of supplements and sell them to Doctors and personal trainers here.

    I am certain that your yk11 Sarm will be a big hit here.

    I would like to see if you have any wholesale pricing available. I can see a pretty good business here if I can get a solid price point for these guys here.

    I hope to hear back from you,


    1. admin says

      Yes we can probably work something out. What kind of products did you have an interest in?

      1. Bert Stare says

        Aaaaand he was never heard from again haha

  2. sarms yk11 supplier says

    Hi, we are manufacturer of sarms in China and we have solo price of YK11, you can add my skype cindy.smith1232 to discuss our business. Email: [email protected].

  3. brad says

    Where is a good place to get yk11?

  4. Gurpreet singh says

    I m was going to start my tren acetate/ test cycle/ GW 50516 / OSTA cycle for 10weeks , I dnt know much bout YK11 , shud this be good adding to the cycle or in PCT???

  5. Bill Reedy says

    I just bought YK11 chem-tek-labs capsules, do I take on an empty stomach or does that matter, and if I take 1 at 7a.m. when or how often do I take the other 2, they are not clear on this? My doc. has me on 200mg/wk cypionate will this go well with the YK11???? Thanks Bill

    1. paul says

      you cant ask questions about taking these sarms for yourself because they are not for human consumption and these places would get in toruble. You have to say something like “I have a lab rat that is going to start taking lgd4033 how long should he be on it”

  6. nuno says

    i would like to know more feedbacks from users of yk 11 .results , sides, what to expect from a yk11 cycle.. Anyone ??

  7. Bob Larkins says

    I was just reading about YK11. Where can this be bought at and what is the price?

  8. Bob Larkins says

    where can YK11 be purchased

  9. Linda says

    I am 56 female..can I take this YK11? I want more size and muscle as an competitor.

  10. Linda says

    What products do you have that i can try that will help my physique as an female..any samples?

  11. CHEW says

    I had this once. Such a great product. Feel so much stronger. Muscle mass just comes. Especially with the diet. This stuff seriously makes more muscle than a cycle. I just can’t get my hands on more. Hard to find

  12. russell carney jr says

    Why are they so hard to come by and expensive in these early stages, usually there promoting this at a low price to get it out there. I’ve been trying to buy bulk with testing kits and info. Nobody wants to help?

  13. Mustang says

    Yk-11 is not a SARM it’s a synthetic steroid. Do your research people. No Animal or Human trails have ever been conducted. 0 information on this Chemical. All studies have been in test tubes. No one knows the dosage or the effects. Stay safe my friends

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