Description

Technical Parameters

YK11 (myostatin inhibitor) 10mg 100 tablets/bottle Core Information *

Pharmaceutical -grade formulation | YK11 (the first myostatin inhibitor SARM )

Chemical Name : (2S,3S,5S,10R,13S,17S)-17-[(1R)-1,2-dihydroxyethyl]-2,3-cyclopentane-10,13-dimethyl-2,3,4,5,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-17-ol

CAS number : 431579-34-9

Molecular formula : C₃₀H₄₄O₃

Molecular weight : 452.68

Specifications : 10mg/tablet, 100 tablets/bottle

Dosage form : Enteric-coated tablets

Appearance : White enteric-coated tablets with a dividing line

Core Effects

YK11 is a first-in-class selective androgen receptor modulator (SRM) of the myostatin inhibitor class . Due to its unique dual mechanism of action , it is widely used for extreme muscle growth, strength breakthroughs, and extreme performance enhancement .

✅ Dual action mechanism :

Myostatin inhibition : Directly inhibits myostatin, removing the restriction of muscle growth

Androgen receptor regulation : Selectively activates androgen receptors to promote protein synthesis

Synergistic Effects : Dual pathways achieve muscle growth effects beyond traditional SARMs

✅ Ultimate muscle-building effect :

Muscle Supergain : Unlocking the Natural Limitation of Myostatin on Muscle Growth

Myofiber hyperplasia : Promotes an increase in the number of muscle fibers (hyperplasia)

Strength Explosion Improvement : Core movement strength increased by 30-50%

✅ Unique metabolic properties :

Orally active : High bioavailability, no injection required

Short half-life : about 2-4 hours, requiring divided dosing

No aromatization : No conversion to estrogen, no risk of water retention

✅ Advantages :

Breaking the Physiological Limits : Unlocking Natural Limits to Muscle Growth

Dual action : myostatin inhibition + androgen receptor activation

Powerful Muscle Building : Outperforming Traditional SARMs

End Product Preparation Guidelines

1. Preparation of enteric-coated tablets (10 mg/tablet) :

Example recipe (for 1000 tablets):

YK11 raw material: 10.0g

Microcrystalline cellulose: 80.0g

Lactose: 50.0g

Cross-linked carboxymethyl cellulose sodium: 8.0g

Magnesium stearate: 2.0g

Preparation process :

Raw material pretreatment : micronization (D90≤10μm)

Equal amount incremental mixing : gradually mix with diluent

Wet granulation : granulate with appropriate amount of purified water and dry in fluid bed at 50°C

Granulation : 20 mesh sieve granules, add flow aids and lubricants

Tableting : 8mm round die, 8-10kN pressure tableting

Enteric coating : pH-dependent enteric coating ensures intestinal release

Quality Control :

Content uniformity : RSD≤3% (HPLC detection)

Dissolution : ≤10% in gastric juice within 2 hours, ≥85% in intestinal juice within 45 minutes

Related substances : Single impurity ≤ 0.5%, total impurities ≤ 1.0%

2. Preparation Notes :

Moisture-proof treatment : The raw material is hygroscopic and the ambient humidity needs to be controlled

Light-proof operation : sensitive to light, need to be packaged in a light-proof manner

Enteric Coated Guarantee : Ensures no dissolution in the stomach and targeted release in the intestine

Usage Protocol

1. Standard usage scenario :

Dosage regimen :

Starting dose: 5 mg twice daily

Maintenance dose: 10 mg twice a day

Maximum dose: no more than 30 mg/day

Cycle Length :

Standard cycle: 4-6 weeks

Advanced cycle: 6-8 weeks (close monitoring required)

2. Split-dose dosing strategy :

Dose time :

Morning: Take 1 hour before training

Evening: Take after training or before bed

Take on an empty stomach : Take 1 hour before or 2 hours after a meal

3. Advanced usage :

Impact Cycle :

Dosage: 10 mg three times a day

Period: 4 weeks (extreme muscle gain)

Maintenance cycle :

Dosage: 5 mg twice daily

Period: 4-6 weeks (consolidation effect)

4. Post-cycle therapy (PCT) :

PCT Necessity :

All YK11 cycles must be followed by PCT

Strongly inhibit endogenous testosterone secretion

PCT Program :

Tamoxifen: 20 mg/day for 4 weeks

Clomiphene: 50 mg/day for 2 weeks, 25 mg/day for 2 weeks

5. Side Effect Management :

Common side effects :

Tightness in joints (due to rapid muscle growth)

Increased tendon pressure

Strong inhibition of the HPTA axis

Countermeasures :

Supplement joint protectors (glucosamine, chondroitin)

Appropriately reduce training intensity

Strictly carry out PCT

Why choose YK11 ?

Myostatin Inhibition : The only SARM that directly inhibits the muscle growth limiting factor

Dual action mechanism : Breaking through the limits of traditional muscle-building drugs

Powerful Muscle Growth : Achieve muscle growth beyond physiological limits

Quality Assurance :

cGMP standard production : strict quality control system

Stability verification : Accelerated test for 6 months meets the standards

Third-party test report : COA certificate is provided for each batch

Professional Packaging :

Moisture-proof bottle : 100 tablets/bottle, built-in desiccant

Light-proof protection : aluminum-plastic blister + light-proof bottle double protection

Child safety cap : prevent children from accidentally swallowing

Conclusion

YK11 is a groundbreaking myostatin inhibitor SARM product , particularly suitable for advanced users seeking extreme muscle growth and strength breakthroughs . The recommended dose is 10-20mg/day for a 4-6 week cycle .

Need a personalized cycle plan ?

We provide professional medication guidance to help you use the product safely and effectively!

Need anything, please contact us