Mutant YK11 – 5mg (60 Capsules)

✔ Supports lean muscle growth
✔ Helps increase strength output
✔ Promotes firmer, denser muscle appearance

$89.99

Availability: 15 in stock

SKU MUTANTYK Category Capsules Tags Build Muscle, Burn Fat Brand: Enhanced Athlete

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Break Through Your Genetic Muscle-Building Limits

How it works

YK-11 is among the most distinctive compounds in selective androgen receptor research.
Unlike typical non-steroidal SARMs, YK-11 possesses a steroidal backbone derived from dihydrotestosterone (DHT) while still functioning as a selective androgen receptor modulator. This hybrid structure allows it to activate anabolic signalling while influencing additional gene pathways not observed in other SARMs.

What makes it remarkable is its apparent impact on follistatin—a regulatory glycoprotein that binds and neutralises myostatin, the natural protein responsible for limiting muscle growth. By upregulating follistatin, YK-11 may indirectly suppress myostatin, enabling extended muscle cell development beyond standard anabolic signalling thresholds.

What You'll Notice

So What Exactly Is This Stuff?

YK-11’s anabolic influence leads to gradual but highly refined gains in muscle tissue.
Rather than increasing intracellular water or glycogen, it appears to promote muscle fibre differentiation—the formation of new contractile fibres that improve density and definition.
Researchers often describe the resulting tissue as “dry, hard, and mature,” reflecting structural rather than volumetric growth.

This lean-tissue effect also contributes to improved vascular visibility and muscular definition, making YK-11 a frequent focus in studies exploring muscle-quality enhancement over bulk size.

Understanding the Myostatin Pathway

Myostatin acts as a biological “growth regulator,” limiting how much skeletal muscle tissue the body can build. Individuals with lower myostatin levels naturally exhibit greater muscle potential. YK-11’s mechanism centres on increasing follistatin, which binds to and inhibits myostatin, reducing that genetic limitation.

Laboratory studies indicate that when follistatin production was blocked, YK-11’s anabolic effects diminished—supporting the theory that follistatin induction is its primary driver of action. This sets YK-11 apart from other SARMs, which rely solely on androgen receptor activation to stimulate muscle protein synthesis.

Performance and Strength Observations

Experimental data suggest that YK-11 enhances endurance and muscular stamina by delaying fatigue under sustained load. Its impact on raw strength output is moderate but steady, indicating efficiency in muscular adaptation rather than explosive power.
Some hypotheses note that extreme suppression of myostatin could alter muscle fibre composition toward slower-twitch endurance fibres, though this effect has primarily been observed in preclinical models.

YK-11 + RAD-140 – Explores dual pathways: androgen receptor activation plus myostatin modulation
YK-11 + LGD-4033 – Examines mass-building synergy via complementary receptor selectivity
YK-11 + Cardarine (GW-501516) – Investigates concurrent endurance and fat-oxidation effects
YK-11 + Ostarine (MK-2866) – Evaluates lean-gain support with reduced suppression profiles

These research pairings aim to study additive or synergistic effects across distinct molecular targets.

Dosage Guidelines

Beginners

Intermediate

Advanced

Timing:

YK-11 displays an active window of approximately 6–12 hours, making twice-daily administration common for stable concentrations.

Duration:

Research periods typically last 4–6 weeks, with some extending to 8 weeks in advanced settings. Shorter cycles are favoured due to YK-11’s steroidal backbone and increased metabolic load compared to non-steroidal SARMs.

Response Timeline

Early indicators—enhanced muscle tone and firmness—often appear within 10–14 days, with progressive changes in muscle density throughout the study duration.

What's In The Bottle

Disclaimer: The information provided is for educational and informational purposes only and should not be considered medical advice, diagnosis, or treatment. Always consult your physician or a qualified healthcare professional regarding any medical concerns or before using any products. Do not ignore or delay medical advice based on content seen here. We are not liable for how any research compounds are used.

Mutant YK11 – 5mg (60 Capsules)

Break Through Your Genetic Muscle-Building Limits

How it works

What You'll Notice

Blocks myostatin naturally

Increases follistatin

Dense Muscle Appearance

High Anabolic Activity

Improves bone density

Stack Compatibility

Fast-acting results

Promotes muscle differentiation