YK11 (Myostatin)
Myostatin Inhibitor
£55.00
What’s Included
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60 capsules per bottle -
10mg pure YK-11 per capsule
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2-month supply (1 cap daily)
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Third-party lab certificate included
Lab Tested
Third-party verified
Fast Shipping
3-7 business days
24/7 Support
Expert guidance
Product details
Buy YK11 UK: CORE supplies YK11 (Myostatin) in the UK as 60 x 10mg capsules, third-party lab tested, with the certificate included.
YK-11 MYOSTATIN is a unique compound that acts as both a SARM and a myostatin inhibitor, providing unparalleled muscle-building potential. By blocking myostatin, the protein that limits muscle growth, YK-11 enables extraordinary muscle development that surpasses natural genetic limits.
Our premium YK-11 MYOSTATIN is manufactured to pharmaceutical standards and third-party tested for purity. Each capsule contains 10mg of pure YK-11, delivering powerful muscle-building effects for serious athletes.
YK-11 (Myostatin) – The Advanced SARM for Muscle Building
The dualistic nature of YK-11 (acting both as a SARM and as a myostatin inhibitor[1]) makes it one of the most potent compounds for lean muscle building. It may not only support muscle growth, but also lifts the limits towards which your muscle mass may grow. This means that it is a supplement that may offer quicker muscle development than other products in this category.
Due to its potency, to use YK-11 (Myostatin) effectively, it is important to ensure proper cycling. It is best not to extend a maximum of 8 weeks of intake. Moreover, this product should be used only if you have experience with other muscle-building SARMs. Afterwards, follow up with a detailed post-cycle therapy procedure. This approach is necessary to both reach its potentially potent benefits and ensure safe intake.
Active Ingredients
Purity & Quality
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Third-party lab tested -
99.6%+ purity guaranteed -
24-month shelf life
YK-11 MYOSTATIN works through a dual mechanism: it acts as a selective androgen receptor modulator while simultaneously inhibiting myostatin, a protein that naturally limits muscle growth. This unique action allows for muscle development beyond normal genetic limitations.
By blocking myostatin, YK-11 removes the natural brakes on muscle growth, allowing for rapid and substantial muscle gains. The compound also increases follistatin levels, further supporting muscle development and strength gains.
With a half-life of 6-10 hours, YK-11 provides rapid and dramatic results that are often visible within the first week of use.
Key Actions
YK-11 works differently to most SARMs, targeting myostatin, the protein that limits how much muscle your body can build. Compare it with other bulking options in Best SARMs for Bulking.
Real results from real customers
Transformations from verified customers. Individual results vary.
Reviews
Rated 5 by verified UK buyers.
What are the Key Benefits of YK11 (Myostatin)?
Massive muscle growth
Myostatin inhibition
Strength enhancement
Rapid results
Improved muscle density
Enhanced recovery
How to Use YK11 (Myostatin)?
Dosage
10mg once daily
Timing
Take before bedtime for optimal results
Cycle Length
6-8 weeks followed by 4-week break
Important
Dietary supplement use only
Take with meals. Due to potency, limit cycles to 8 weeks maximum.
Training
Push progressive overload with compound lifts. Muscle responds well to heavy loading here.
Diet
Eat at a calorie surplus. Add extra protein and omega-3s to protect your joints and keep cholesterol in check.
Stacking and cycle guidance
YK-11 can be paired with a range of compounds depending on what you're aiming for. Pick a single companion below to stack with YK-11 and save 5%, or choose a complete bundle further down for a bigger discount:
RAD 140 (Testolone) + YK11 (Myostatin)
Advanced: RAD-140 pairs a potent androgen receptor agonist with YK-11's myostatin-blocking effect for maximum mass.
£99.75 £105.00 Save 5%
YK-11 5-10mg + RAD-140 5-15mg, both once daily. Keep this stack to 6-8 weeks given the combined intensity. PCT required after.
RAD 140 dosage, side effects and results guide
MK 677 (Ibutamoren) + YK11 (Myostatin)
Recovery: MK-677's extra growth hormone output helps offset the joint and tendon stress YK-11 can bring.
£97.85 £103.00 Save 5%
YK-11 5-10mg each morning. MK-677 10-25mg, 30-60 minutes before bed. Run together for 6-8 weeks. PCT still required for the YK-11 portion.
MK 677 side effects, benefits and dosage guide
Cardarine (GW501516) + YK11 (Myostatin)
Endurance support: Cardarine keeps training volume up while YK-11 does the heavy lifting on mass.
£99.75 £105.00 Save 5%
YK-11 5-10mg each morning. Cardarine 5-10mg, 1-2 hours before training. Run together for 6-8 weeks. PCT still required for the YK-11 portion.
Complete Bundles
Prefer a full protocol in one order? These pre-built bundles pair YK-11 (Myostatin) with 3-4 companions at a bigger combined discount:
Bulking Bundle
Complete stack: RAD-140, YK-11, LGD-4033, and MK-677 bundled for maximum bulking power, priced below buying each alone.
£175.00 £195.00 Save 10%
YK-11, LGD-4033, and RAD-140 (20mg each) together each morning, a second YK-11 dose in the evening, MK-677 20mg before bed. 6-8 weeks max. PCT required after.
The CORE SARMS Handbook walks through dosing, cycle length, and stacking logic for every compound on this page.
Read the CORE SARMs Handbook →Post-cycle support
Frequently Asked Questions
Contact supportYK-11 is a unique compound that acts as both a SARM and myostatin inhibitor, providing exceptional muscle building potential.
YK-11 uniquely inhibits myostatin, the protein that limits muscle growth, allowing for gains beyond normal genetic limits.
YK-11 is very potent and recommended for experienced users who have completed cycles with milder SARMs first.
Reported effects include mild fatigue, joint stiffness, and temporary hormonal suppression. Individual responses vary, and not all users experience side effects.
Users typically gain 10-15 pounds of muscle in 6-8 weeks, with significant strength increases throughout the cycle.
Yes, YK-11 is known as a myostatin inhibitor, meaning it may help reduce the activity of myostatin, a protein that limits muscle growth. By potentially blocking myostatin, YK-11 may promote greater muscle development and strength gains compared to traditional SARMs.
YK-11 may support rapid muscle growth, enhanced strength, and improved recovery. It combines the effects of a SARM and myostatin inhibitor, helping users gain dense, lean muscle tissue while maintaining definition. Some users also notice better muscle hardness and endurance over time.
YK-11 binds selectively to androgen receptors in muscle and bone tissue while simultaneously reducing myostatin activity. This dual action helps stimulate muscle protein synthesis, supporting increased strength, growth, and overall athletic performance.
YK-11 is typically taken once daily, with cycle lengths ranging from 6 to 8 weeks. It can be used alone or stacked with other SARMs like RAD-140 or LGD-4033 for enhanced results, but always follow the manufacturer’s dosage guidelines.
You can buy YK11 UK directly from CORE. Each bottle holds 60 x 10mg YK11 (Myostatin) capsules, a 2-month supply at 1 capsule daily, with a third-party lab certificate included. UK orders typically arrive in 3-7 business days.
Looking for something else?
Is your primary goal muscle growth? Explore other options and see Ibutamoren (MK-677) available at CORE SARMS.
Related products
References:
- Kanno, Y., Ota, R., Someya, K., Kusakabe, T., Kato, K., & Inouye, Y. (2013). Selective androgen receptor modulator, YK11, regulates myogenic differentiation of C2C12 myoblasts by follistatin expression. Biological & pharmaceutical bulletin, 36(9), 1460–1465. https://doi.org/10.1248/bpb.b13-00231
