Three-bottle research bundleOne 30 mL bottle each of MK-677, YK-11, and LGD-4033, supplied together at a bundle discount.
25, 10 & 10 mg/mLMK-677 at 25 mg/mL (750 mg); YK-11 and LGD-4033 each at 10 mg/mL (300 mg), all under 5% variance.
Independently verifiedEach compound is HPLC-tested by an accredited US third-party lab for purity and identity.
Research use onlySupplied exclusively for laboratory investigation and development.
| Compound Class | Growth Hormone Secretagogue · Ghrelin Receptor (GHSR-1a) Agonist · Non-steroidal |
|---|---|
| Concentration | 25 mg/mL |
| Composition | USP-grade PEG-400 base, MK-677 (≥98% purity) |
| CAS Number | 159752-10-0 |
| Chemical Formula | C27H36N4O5S |
| Molar Mass | 528.66 g/mol |
| Half-Life | ~24 hours |
| Synonyms | Ibutamoren, MK-677, Nutrobal, MK-0677, L-163,191 |
| Volume | 30 mL per bottle (750 mg total) |
| Verified Purity | Batch-tested to 99.87% (HPLC) |
| Compound Class | Selective Androgen Receptor Modulator (SARM) · Steroidal · Androgen receptor partial agonist |
|---|---|
| Concentration | 10 mg/mL |
| Composition | USP-grade PEG-400 base, YK-11 (≥98% purity) |
| CAS Number | 1370003-76-1 |
| Chemical Formula | C25H34O6 |
| Molar Mass | 430.54 g/mol |
| Synonyms | YK-11, YK11 |
| Volume | 30 mL per bottle (300 mg total) |
| Verified Purity | Batch-tested to 98.76% (HPLC) |
| Compound Class | Selective Androgen Receptor Modulator (SARM) · Non-steroidal |
|---|---|
| Concentration | 10 mg/mL |
| Composition | USP-grade PEG-400 base, LGD-4033 (≥97% purity) |
| CAS Number | 1165910-22-4 |
| Chemical Formula | C14H12F6N2O |
| Molar Mass | 338.26 g/mol |
| Half-Life | ~24–36 hours |
| Synonyms | Ligandrol, LGD-4033, VK5211, Anabolicum |
| Volume | 30 mL per bottle (300 mg total) |
| Verified Purity | Batch-tested to 97.25% (HPLC) |
For laboratory research use only. Not for human or animal consumption.
Each compound in this bundle is analyzed by an accredited US third-party laboratory before it ships.
Accredited testing partner
Purity and identity confirmed by MZ Biolabs (Tucson, AZ), a US DEA-licensed analytical facility, via HPLC purity analysis and mass-spectrometry identity confirmation under GLP standards.
Published certificates of analysis
Our third-party certificates of analysis are published on our website — no login required.
See all certificates of analysis
All three bottles are built to preserve compound integrity throughout your research timeline.
Quality control across the research-compound industry is inconsistent, which makes third-party verification essential. A 2017 analysis published in JAMA examined 44 products marketed online as SARMs and reported wide gaps between labels and contents.
52%contained the labeled compound
39%contained an unapproved drug
25%contained an unlabeled substance
9%contained no active ingredient
Source: Van Wagoner et al., JAMA, 2017 (ref. 4).
Third-party tested & certified
All three compounds verified by MZ Biolabs (Tucson, AZ), an accredited US laboratory, via HPLC and mass spectrometry.
USP-grade PEG-400
Suspended in the highest grade carrier and bottled in America.
Glass bottles, fixed glass droppers
Prevents BPA leaching and avoids contamination from external tools.
60-day money-back guarantee
Transparent business, standard payment methods, no misrepresentation.
Component 1
A non-peptide ghrelin receptor (GHSR-1a) agonist and growth hormone secretagogue. Mechanistically, it binds and activates the GHSR-1a receptor — the same receptor targeted by the endogenous peptide ghrelin. It is orally bioavailable in study models and has been an investigational compound since the 1990s. It is not a SARM (ref. 1).
Component 2
A synthetic steroidal compound that acts as a partial agonist of the androgen receptor in vitro. It is commonly catalogued among SARMs and was first described in the research literature by Kanno et al. in 2011 (ref. 2).
Component 3
A non-steroidal selective androgen receptor modulator (SARM). Mechanistically, it binds the androgen receptor with high affinity and tissue selectivity, distinguishing it from steroidal androgens. It was originally developed as an investigational compound by Ligand Pharmaceuticals (ref. 3).
All three compounds remain experimental research chemicals, supplied strictly for laboratory research. Sports Technology Labs makes no claims regarding their effects, and nothing in this listing should be interpreted as describing outcomes in humans or animals.
Not approved for human use
MK-677, YK-11, and LGD-4033 are investigational compounds. They are not approved by the FDA and are not dietary supplements, drugs, or food. Marketing them for human ingestion is unlawful.
WADA-prohibited
All three are prohibited by the World Anti-Doping Agency: YK-11 and LGD-4033 under S1 (Anabolic Agents — SARMs), and MK-677 under S2 (Peptide Hormones, Growth Factors, Related Substances and Mimetics), banned in- and out-of-competition (ref. 5).
Legal status varies by jurisdiction
In the United States, none is a federally controlled substance and all may be legally purchased and possessed for laboratory research use. YK-11’s legal status differs in some other countries, where it may be restricted.
Our position
Sports Technology Labs are chemical suppliers, not medical providers. We do not condone or encourage consumer use of research compounds.
Research use only. All products on this website are intended exclusively for laboratory research and development. They are not for human or animal consumption. These statements have not been evaluated by the U.S. Food and Drug Administration, and these products are not intended to diagnose, treat, cure, or prevent any disease.
| Weight | 9 oz |
|---|---|
| Dimensions | 5 × 5 × 2 in |
