YK-11 SARM is a myostatin inhibitor that greatly increases the potential for muscle growth. Despite only being discovered in 2011, YK-11 is quickly becoming known as one of the most powerful SARMs throughout the research community.


When you order this product through Paradigm Peptides, you’ll receive 30 tablets (10 MG each) per order. When using YK-11 in your research, the recommended YK-11 dosage is 2 – 5 mg twice a day for a 6-week period.

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YK 11 is a SARM and a myostatin inhibitor. The word SARM is an acronym for the phrase selective androgen receptor modulators. These compounds typically work by attaching themselves to muscle and bone tissue without affecting internal organs negatively. In terms of YK 11, it inhibits myostatin meaning that the body can then create more muscle cells and build up lean muscle mass. Myostatin’s primary function is to restrict muscle cell growth and differentiation. In blocking myostatin, obtaining fast gains becomes a reality.

Benefits of YK 11

Many benefits are attributed to the use of YK 11. Some of these side effects being muscle growth and hardening, increased levels of Follistatin, and fat loss. Because of the mechanism of YK 11, gains can be seen when proper dosages are used and because of its efficacy, a high dose is not even necessary. Not only that, users have also reported things like better endurance and strength accompanied by better blood circulation from taking YK. But that is not even the best part. The best part of using YK 11 to gain your muscles instead of a substance like anabolic steroids is that there are no known negative anabolic effects.

Recap of Benefits:

  • Lean Muscle Mass
  • Increased Follistatin Production
  • Increased Fat Loss
  • Increased Strength and Endurance
  • Improved Blood Circulation

Side Effects of YK 11

Side effects are not very popular with this SARM; however, some users have indeed reported a few different side effects. Mild acne, which is more an inconvenience is one thing that was reported, along with increased aggression, and some joint pain. Although these side effects are mild in nature, if they persist or get worse, it is recommended to seat medical attention. In rare cases, some liver damage has been reported but can be counter acted by using a post cycle therapy of either tamoxifen or clomifene for a four-week duration after you complete a cycle of YK 11.

Recap of Side Effects:

  • Mild Acne
  • Joint Pain
  • Reversible Liver Impairment
  • Increased Aggression

Dosage Information

As mentioned, because of the potency of YK 11, you do not need a higher dosage to achieve efficacy. YK 11 is however known to have a half life of twelve hours so there are a couple of ways it has been taken, both of which are equally effective. In one scenario, YK 11 can be taken twice daily at 5mg per dose.

If you do not feel like playing with that idea, or know you may forget the second dose, you can go for option number two. In option number two, rather than take two 5mg doses, you just take a single dose of 10mg per day. This is the most common option among bodybuilders and workout aficionados. The cycle itself is roughly eight weeks with a PCT included at the end.

Because YK 11 does have the potential to cause some reversible liver damage it is important to remember to complete post cycle therapy after each cycle. The post cycle therapy regimen is recommended to last four weeks and can include either tamoxifen or clomifene. Of the two, tamoxifen seems the most popular across the boards. When taking it as your PCT regimen, it is recommended at a dose between 25mg and 50mg with the dosage starting off on the higher side and then reducing as you complete your PCT.

Popular Stacks with YK 11

If you are thinking about stacking there are a few variations that work with YK 11. If you would like to stay more on the simple side, you can simply pair YK 11 with LGD 4033. Unlike most stacks, this stack only lasts a duration of six weeks.

The stack works with the following doses:

Week 1 & 2

  • LGD 4033: 10mg per day
  • YK 11: 10mg per day

Week 3 thru 6

  • LGD 4033: 20mg per day
  • YK 11: 10mg per day

In a more complex stack, you can take both LGD 4033, YK 11, and MK 677 together for an eight-week cycle with the following dosages.

Week 1

  • LGD 4033: 5mg per day
  • YK 11: 5mg per day
  • MK 677: 25mg per day

Week 2 thru 5

  • LGD 4033: 10mg per day
  • YK 11: 10mg per day
  • MK 677: 25mg per day

Week 6 thru 8

  • LGD 4033: 15mg per day
  • YK 11: 20mg per day
  • MK 677: 25mg per day

The nice thing about this stack is that when you add MK 677 you gain other benefits like improved memory on top of gaining more muscle. However, if MK 677 is not your thing, you can still stack both LGD 4033 and YK 11 along with S4 Andarine instead. The breakdown for this stack looks something like this:

Week 1

  • LGD 4033: 10mg per day
  • YK 11: 10mg per day
  • S4 Andarine: 50mg per day

Week 2 thru 8

  • LGD 4033: 20mg per day
  • YK 11: 10mg per day
  • S4 Andarine: 50mg per day

In this stack, all three SARMs are known for their improvements in muscle mass, bone density and more! The fact that these three work so well together makes it a good bulking and powerlifting stack.

From these various stacks you can expect faster muscle gains, better healing times, and even more benefits as the various SARMs have their own additional positives they add to the stacks!


Name: YK-11 SARM

CAS: 431579-34-9

Sequence: Ac-Tyr-Lys-D-Cys(1)-D-Glu-His-Phe-Arg-D-Trp-D-Cys(1)-NH2

Molecular Formula: C152H252N44O42

Molecular Weight: 3367.2

Purity: 99%

Appearance: White Powder

Grade: Pharmaceutical

Specification: 30 tablets per order (10 MG each)

Paradigm Peptides

Paradigm Peptides prides itself on providing top quality, authentic SARMs, peptides, and research chemicals for sale. Manufacturing of our products is all done within the Midwest with our labs based out of Tennessee. Want to learn more about other peptides, SARMs, or research chemicals then head over to Paradigm’s blog for more information.

If you are past researching and looking to start your muscle gaining journey, then place your order for YK 11 SARM today with Paradigm Peptides, your one stop shop for everything bodybuilding and fitness!


*Disclaimer: These products are not intended to diagnose, treat, or cure any condition or disease.

Additional Information
Weight.45 oz

2 oz


3"H 2"W 2"L

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