Description
YK-11 Capsules
Disclaimer: All Iron Mountain Labz products are only intended for laboratory research and are not approved for human consumption.
Overview of YK-11
YK-11 is a synthetic steroidal compound that is categorized as a partial SARM and myostatin inhibitor. It interacts with the androgen receptors and increases follistatin expression. This suppresses myostatin to promote muscle cell growth and bone health in research models.
The dual mechanism of YK-11 sets it apart from traditional SARMs and makes it a notable compound in muscle and bone health research.
| Section | Details |
| CAS Number | 1370003-76-1 ® |
| Molar Mass | 430.5 g/mol |
| Chemical Formula | C25H34O6 |
| IUPAC Name | methyl (2E)-2-[(8R,9S,10R,13S,14S,17S)-2′-methoxy-2′,13-dimethyl-3-oxospiro[1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthrene-17,5′-1,3-dioxolane]-4′-ylidene]acetate |
| Synonyms | YK-11, YK11, Z9748J6B0R, UNII-Z9748J6B0R |
| Ingredients / Composition | YK-11 Capsules contain YK-11 as the active ingredient with 98.8% purity |
| Shelf Life | 2 years |
| Storage Instructions | Store YK-11 Capsules in a dry and cool environment. |
| Disclaimer | YK-11 is not approved for human use. It is legal for research purposes only. |
Why buy YK-11 Capsules from Iron Mountain Labz?
Researchers choose Iron Mountain Labz to buy YK-11 Capsules due to the following reasons:
– Iron Mountain Labz YK-11 Capsules are tested with HPLC and confirmed at 98.8% purity.
– The assay result meets research-grade standards at 98.7%.
– The endotoxin levels of YK-11 capsules are verified at <0.2 EU/mg, which is well below the ≤5 EU/mg specification.
– The heavy metals are measured at <5 ppm, which is under the ≤10 ppm threshold.
– YK-11 Capsules are delivered with a Certificate of Analysis (COA).
Note: Researchers can get YK-11 Capsules from Iron Mountain Labz for their research applications. The SARMs capsule range at Iron Mountain Labz also includes options such as MK-677 Ibutamoren Capsules and LGD-3303 Capsules.
Frequently Asked Questions
Is YK-11 legal in the United States?
YK-11 is not approved by the U.S. Food and Drug Administration (FDA) for therapeutic use. It is an investigational compound and is legally sold for research purposes in the United States.
How does YK-11 Capsules work in research?
YK-11 functions as a partial androgen receptor agonist and increases follistatin expression. Follistatin inhibits myostatin, which supports muscle cell differentiation and growth in research models.
Does YK-11 have side effects in research models?
YK-11 has been linked to testosterone suppression and oxidative stress in research models. Studies also suggest it may cause mitochondrial dysfunction and neurotoxicity in the hippocampus of the research subjects.
How do I buy YK-11 Capsules online from your store?
YK-11 Capsules can be purchased online from the Iron Mountain Labz website. Select the product, complete your checkout process to confirm the order. You’re more likely to get this product within 5 to 12 business days after placing an order.






Blaine Snyder –
It does what it says! Saw noticeable gains in just a few days. Highly recommend!
Sid Harding –
Delivers exceptional results for muscle growth. Will recommend this to a few people I know
Yash Mcneil –
Best for muscle gain but the shipping took longer.
Mikey Blevins –
Noticeable results in only like 3 weeks. Really looking forward to experimenting with some of your other products soon
Cameron Alexander –
Top notch quality products that always impress!
Ismaeel Burch –
Excellent product, purity exceeded my expectations!
Ismaeel Burch –
Excellent product, purity exceeded my expectations!
Zach Hardy –
An all-time favorite for me! Must-have
Zach Hardy –
An all-time favorite for me! Must-have
Sonny Hewitt –
This product changed my life. Highly Recommend!
Sonny Hewitt –
This product changed my life. Highly Recommend!
Ty Ross –
Nice quality
Ty Ross –
Nice quality
Emil Meyers –
More than exceptional
Emil Meyers –
More than exceptional
Ajay Hayes –
Makes life so much easier. Love it!
Joshua Benz –
Happy with the product. Awesome!!
Julia –
My package arrived much sooner than I expected. I could tell they take care in how they handle their products.
Sam Jose –
Impressive Strength Boost & Aesthetic Results. Highly Recommended!
Tessa Vaughn –
Excellent quality. Happy with my purchase. Highly satisfied.
Emma Roberts –
Excellent customer service. Answered all my questions promptly.