YK-11
For Sale
YK-11 — the only SARM that also inhibits myostatin. Dual-mechanism research compound with steroidal backbone. Independently tested to ≥99% purity via HPLC and Mass Spectrometry. Liquid, powder, and capsules available. Free shipping over $100.
Third-Party COA
Myostatin Inhibitor
USA Manufactured
Free Shipping $100+
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Research Compound Overview
What Is YK-11? The Only SARM With Myostatin Inhibition
YK-11 is a synthetic steroidal compound that acts as both a partial androgen receptor (AR) agonist and a myostatin inhibitor — making it the most structurally and mechanistically unique compound in the SARM research category. Unlike non-steroidal SARMs such as RAD 140, LGD-4033, or Ostarine, YK-11 has a steroidal backbone derived from DHT (dihydrotestosterone), giving it a dual mechanism no other SARM possesses.
When you buy YK-11 for sale from PureRawz, every batch is independently verified to ≥99% purity via HPLC and Mass Spectrometry by MZ Biolabs. The Certificate of Analysis for every batch is published publicly on the product page, searchable by lot number.
YK-11 Product Specifications
| Compound Name | YK-11 (YK11) |
| Class | Steroidal SARM / Myostatin Inhibitor |
| Molecular Formula | C₂₅H₃₄O₆ |
| Molecular Weight | 430.53 g/mol |
| CAS Number | 431579-34-9 |
| Backbone | Steroidal (DHT derivative) |
| Purity (PureRawz) | ≥99% HPLC verified |
| Testing Lab | MZ Biolabs (independent, third-party) |
| Half-Life (animal) | ~6–10 hours (oral) |
| Available Forms | Liquid · Capsules · Powder |
| Intended Use | Research purposes only — not for human use |
Available Formats
YK-11 For Sale in Multiple Research Forms
PureRawz offers YK-11 in three delivery formats. All forms use the same ≥99% purity compound with batch-specific third-party COA documentation.
Pre-suspended YK-11 in carrier solution at a precise concentration. Ready for immediate research use. Available in 30ml and 60ml amber glass vials with calibrated dropper. Due to YK-11’s shorter half-life in animal models, liquid allows flexible dosing frequency in protocols.
Pre-measured oral capsules delivering a consistent, exact dose. Preferred for research protocols requiring twice-daily administration convenience and dosing reproducibility across multiple research subjects.
Pure YK-11 powder for researchers requiring custom concentrations. Best cost-per-milligram ratio. Available in 1g and bulk 5g quantities for extended research programs or multi-subject studies.
SARM Comparison
YK-11 vs Other SARMs — How Does It Compare?
YK-11 occupies a unique position in SARM research due to its steroidal backbone and myostatin inhibition. The table below highlights key distinctions from the most commonly compared compounds.
| Factor | YK-11 | RAD 140 | LGD-4033 | Ostarine |
|---|---|---|---|---|
| Backbone | Steroidal (DHT) | Non-steroidal | Non-steroidal | Non-steroidal |
| Myostatin Inhibition | Yes — unique | No | No | No |
| AR Agonism | Partial | Full | Full | Full |
| Anabolic Potency | Very High | Very High | Highest | Moderate |
| Selectivity | Moderate | High | Moderate | Very High |
| Clinical Trial Data | Preclinical only | Phase I | Phase I/II | Phase II/III |
| Half-Life (animal) | ~6–10 hours | ~60 hours | ~24–36 hours | ~24 hours |
| PureRawz Price | From $34.99 | From $29.99 | From $29.99 | From $29.99 |
All data reflects preclinical animal model and in vitro findings only. Not applicable to human use.
Why PureRawz
Why Researchers Buy YK-11 From PureRawz
YK-11’s steroidal structure makes purity verification more technically demanding than non-steroidal SARMs. PureRawz holds three standards that eliminate uncertainty.
Every YK-11 batch is tested by MZ Biolabs — accredited, independent, third-party. The COA is published publicly on every product page, searchable by lot number. YK-11’s steroidal backbone requires Mass Spectrometry for accurate identity confirmation — included in every COA.
HPLC and Mass Spectrometry confirm both purity and compound identity. For steroidal compounds, structural isomer contamination is a real concern. Full impurity profiles are documented on every PureRawz YK-11 batch.
Manufactured and fulfilled from a US facility. Orders before 2PM EST ship same business day. Domestic delivery in 2–4 business days. Discreet, unmarked packaging on every order.
YK-11’s steroidal backbone creates a higher counterfeiting risk. Structural isomers of steroidal compounds are difficult to detect without Mass Spectrometry. A COA that only shows HPLC purity — without Mass Spec identity confirmation — is insufficient for YK-11. PureRawz includes both on every batch. That distinction matters for research integrity.
Preclinical Research Overview
YK-11 Research: What the In Vitro & Animal Data Shows
YK-11 has a growing but relatively early-stage research profile compared to non-steroidal SARMs. Most data comes from in vitro cell studies and rodent models. All data reflects in vitro and animal model findings only. YK-11 has no published human clinical trial data.
Primary Research Areas
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Myostatin Inhibition (Follistatin Induction): The defining YK-11 research finding — in vitro studies show YK-11 induces follistatin expression in C2C12 muscle cells, which in turn suppresses myostatin (GDF-8). Myostatin limits natural muscle growth, so its inhibition is studied as a potential path to supraphysiological muscle development in research models.
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Androgen Receptor Partial Agonism: YK-11 binds the androgen receptor as a partial agonist via its steroidal DHT-derived backbone. In vitro data shows it produces anabolic signaling in muscle cells — but with a different receptor interaction profile than full AR agonists like RAD 140 or LGD-4033.
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Muscle Cell Differentiation: In vitro studies in C2C12 myoblast cells demonstrate YK-11 promotes muscle cell differentiation and proliferation at low concentrations — supporting its study as an anabolic research tool.
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Bone Density Research: Preclinical cell culture data suggests YK-11 may promote osteoblast activity and bone mineral density — an area of emerging research interest particularly for osteoporosis models.
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DHT Pathway Research: YK-11’s structural similarity to DHT makes it useful in research examining the DHT-androgen receptor pathway specifically — distinct from testosterone-pathway SARM research, enabling more targeted mechanistic studies.
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Steroidal vs Non-Steroidal SARM Comparisons: YK-11 is frequently used as the steroidal SARM comparator in research examining differences in receptor binding, selectivity, and downstream signaling between steroidal and non-steroidal AR modulators.
YK-11 Legal Status in 2026
YK-11 is legal to purchase in the United States as a research compound. It is not a controlled substance, not scheduled under the DEA, and does not require a prescription when purchased strictly for laboratory research. PureRawz sells YK-11 in full regulatory compliance — labeled for research use only, not for human or animal consumption.
Research Reference
YK-11 Research Dosage Reference — In Vitro & Animal Data Only
The following summarizes dosage ranges from published in vitro and preclinical research. Provided for reference only. Not a recommendation for human use. No human clinical trial data exists for YK-11.
| Research Protocol | Reported Dose | Model | Duration |
|---|---|---|---|
| Follistatin / Myostatin (in vitro) | 10 nM – 1 µM | C2C12 cells | 24–72 hours |
| AR Agonism (in vitro) | 1–100 nM | Cell culture | Acute |
| Muscle Differentiation | 100 nM – 10 µM | Myoblast cells | 5–10 days |
| Bone / Osteoblast Research | 10–100 nM | Cell culture | 7–14 days |
| Animal Model (rodent) | 1–10 mg/kg/day | Oral gavage | 14–28 days |
Data sourced from peer-reviewed in vitro and preclinical literature. YK-11 has no published human clinical trial data. Human use is not endorsed or recommended.
Frequently Asked Questions
YK-11 For Sale — Buyer FAQs
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