RH
Exceptional purity for peptide research
We've been sourcing research-grade peptides for several years. Rainbow Peptide's vials consistently pass our HPLC verification — purity exceeds 98% every batch. COA matched our internal testing exactly.
HPLC Verified
>98% Purity
COA Included
SOMA Recovery & Tissue Repair
YK-11
$59.88
YK-11 is a steroidal SARM and partial androgen receptor agonist studied for its unique dual mechanism: AR agonism and myostatin inhibition via follistatin induction. ≥98% purity, third-party CoA. For Research Use Only.
In Stock — Overnight and 2–3 day delivery available
Product Information
YK-11 Research Chemical
YK-11 is a unique steroidal SARM first described by Kanno et al. (2011) at Tokai University. Unlike non-steroidal SARMs (RAD-140, LGD-4033, Ostarine), YK-11 has a steroidal scaffold structurally similar to DHT (dihydrotestosterone). It is studied for a dual mechanism: partial AR agonism, plus induction of follistatin expression in myocytes, leading to reduced myostatin activity.
Research Applications
- Myostatin inhibition: YK-11 induces follistatin (FST) in C2C12 myoblasts — unique among SARMs
- Muscle hypertrophy signalling research — mTOR/Akt/follistatin pathway
- Partial vs full AR agonism comparative studies
- Steroidal vs non-steroidal SARM mechanistic comparison
Research Notes
YK-11 has a steroidal backbone — researchers should note potential for oestrogenic metabolites (aromatization possible but not well characterized). Limited in vivo rodent data vs non-steroidal SARMs. Primarily studied in cell culture.
Product Specifications
- Purity: ≥98% HPLC confirmed
- Identity: Mass spectrometry (MW: 430.54)
- CoA: Third-party laboratory
- Form: Lyophilized powder, sealed vial
For Research Use Only (RUO). Not for human consumption.
Frequently Asked Questions
- What is YK-11?
- YK-11 is a steroidal SARM and partial androgen receptor agonist studied for its unique dual mechanism: AR agonism and myostatin inhibition via follistatin induction. ≥98% purity, third-party CoA. For Research Use Only.
- Is YK-11 for sale at Rainbow Peptide?
- Yes. YK-11 is available for purchase with Certificate of Analysis confirming >98% HPLC purity. Every order Overnight and 2–3 day delivery available. For Research Use Only.
- What purity is your YK-11?
- Rainbow Peptide's YK-11 is >98% pure, HPLC verified by an accredited third-party laboratory. A COA is included with every order.
- Is YK-11 safe for human use?
- No. YK-11 is strictly For Research Use Only (RUO). It is not intended for human consumption and is not intended to diagnose, treat, cure, or prevent any disease.
- How quickly does YK-11 ship?
- Overnight and 2–3 day delivery available. Ships in temperature-controlled packaging.
Third-Party Verified
Every Order Ships with a Certificate of Analysis
We don't just claim purity — we prove it. Every batch of YK-11 is independently tested by an accredited third-party laboratory before it reaches you. Your COA is linked to your specific lot number.
- HPLC purity analysis — minimum threshold >98%
- Mass spectrometry — molecular weight confirmation
- Lot number traceable to your order
- Endotoxin limits verified — safe for cell-based assays
RAINBOW PEPTIDE LABS CERTIFICATE OF ANALYSIS
Product YK-11
Lot # RP-00193-A
HPLC Purity >98.0% >98.5% PASS
Mass Spec (MW) Confirmed Confirmed PASS
Endotoxin <1 EU/mg <0.5 EU/mg PASS
Visual Inspection White powder White powder PASS
What Researchers Say
Verified purchases from active research labs and scientists
5.00
★★★★★
2 verified reviews MT
Reliable consistency batch to batch
Third order now. Consistent batch-to-batch results matter enormously in long-term research. Certificate of Analysis is detailed with mass spec data. Would not switch sources.
SK
Solid product, shipping was fast
Verified against our reference standards. Purity >98.2% by HPLC. Packaging was appropriate for temperature-sensitive peptides. Will re-order.
