Description
Classification
YK-11 is a synthetic steroidal compound commonly marketed as a selective androgen receptor modulator (SARM) and associated with myostatin/follistatin research. Its precise pharmacology and human safety profile remain poorly established.
Pharmaqo YK11 5mg x 60 describes a product labeled as containing 5mg of YK-11 per capsule, supplied as 60 capsules.
YK-11 is not FDA-approved for human use. FDA has specifically identified YK-11 among products marketed as SARMs and states that such products are unapproved drugs.
What Is Pharmaqo YK11 5mg x 60?
Pharmaqo YK11 5mg x 60 is a product labeled as containing 5mg of YK-11 per capsule.
YK-11 is structurally related to steroidal compounds and has been investigated primarily through laboratory research. Claims that it reliably increases muscle mass or inhibits myostatin in humans are not supported by adequate clinical evidence.
The stated 5mg strength does not independently establish authenticity, purity, concentration, or safety.
Dosage
There is no FDA-approved human dosage for YK-11.
The 5mg figure represents the labeled capsule strength and should not be presented as a recommended bodybuilding dose or cycle.
FDA warns that SARMs, including products marketed as YK-11, have not been reviewed for safety and effectiveness and can be associated with serious adverse events.
How Does Pharmaqo YK11 Work?
YK-11 has been studied in relation to androgen-receptor signaling and pathways involving myostatin and follistatin.
Laboratory research has suggested effects on muscle-cell differentiation and follistatin expression, but these findings should not be interpreted as proof of muscle-building or myostatin-inhibiting effects in humans.
Benefits
YK-11 is commonly marketed around potential:
- Anabolic activity
- Muscle-growth research
- Androgen-receptor signaling
- Myostatin/follistatin research
- Skeletal-muscle research
However, clinical evidence demonstrating these benefits in humans is lacking. FDA specifically warns against assuming that marketed SARM products are safe or effective.
When Should You Take Pharmaqo YK11 5mg x 60?
There is no approved human administration schedule for YK-11.
The 5mg capsule strength should not be used to establish a personal dosing cycle or performance-enhancement regimen.
When Should You Not Take Pharmaqo YK11 5mg x 60?
YK-11 should not be treated as an approved medication or dietary supplement.
Particular caution is warranted because FDA reports that SARM products have been associated with:
- Liver injury
- Acute liver failure
- Increased risk of heart attack or stroke
- Sexual dysfunction
- Infertility
- Testicular shrinkage
- Other potentially serious adverse effects
Pregnancy is also a significant concern with androgenic/SARM-type compounds.
What Is the Mechanism of Pharmaqo YK11?
YK-11 is described as a partial androgen-receptor agonist and has been investigated for effects on muscle-related signaling.
Research has also explored its relationship with follistatin and myostatin-related pathways, although the extent to which these mechanisms translate into meaningful human effects remains uncertain.
Uses of Pharmaqo YK11 5mg x 60
YK-11 is primarily associated with:
- Androgen-receptor research
- Skeletal-muscle research
- Myostatin/follistatin research
- Experimental anabolic research
- Steroid pharmacology
It should not be presented as an approved treatment for muscle growth, fat loss, athletic performance, or bodybuilding.
Warnings and Precautions
The major concern is that YK-11 is an unapproved investigational compound with limited human safety data.
FDA warns that SARM products can cause serious or potentially life-threatening effects, including liver injury and cardiovascular events.
Important precautions include:
- Do not assume “research use” labeling means the product is safe for human use.
- Verify product identity and analytical documentation.
- Do not assume the stated 5mg strength is accurate without appropriate testing.
- Be aware of potential hormonal suppression.
- Athletes should note that YK-11 is prohibited under anti-doping rules.
Side Effects of Pharmaqo YK11 5mg x 60
Because adequate human clinical studies are lacking, the complete side-effect profile of YK-11 has not been established.
Potential concerns associated with YK-11/SARM-type products include:
- Liver injury
- Changes in cholesterol
- Cardiovascular effects
- Hormonal suppression
- Reduced fertility
- Sexual dysfunction
- Mood or sleep changes
- Testicular shrinkage in males
FDA has documented serious adverse events associated with SARM-containing products, including liver injury and cardiovascular events.
Storage for Pharmaqo YK11 5mg x 60
Storage should follow the specific manufacturer’s instructions printed on the packaging.
General considerations include:
- Keep capsules in their original packaging.
- Protect from excessive heat and moisture.
- Protect from direct sunlight.
- Keep away from children.
- Do not use after the expiration date.
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Frequently Asked Questions
1. What Is Pharmaqo YK11 5mg x 60?
It is a product labeled as containing 5mg of YK-11 per capsule, supplied as 60 capsules.
2. What Is YK-11?
YK-11 is an investigational steroidal compound commonly marketed as a SARM and associated with androgen-receptor and myostatin/follistatin research.
3. Is 5mg an Approved Human Dose?
No. 5mg is the labeled capsule strength, not an FDA-approved human dose.
4. What Are the Main Risks of YK-11?
The full human safety profile is unknown. FDA warns that SARM products can be associated with liver injury, cardiovascular events, hormonal effects, infertility, and other serious adverse reactions.
5. Is Pharmaqo YK11 5mg x 60 Safe?
YK-11 should not be considered an approved or established safe human medicine. Its limited clinical evidence and the documented risks associated with SARM products make caution particularly important.




