LGD-4033 and MK-677 Stack

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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. Technical data Product specifications Specifications Lab Reports Storage & Handling Liquid Ligandrol (LGD-4033) — 10 mg/mL 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 1165910-22-4Copy Chemical Formula C14H12F6N2OCopy 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 97.29% (HPLC) Liquid Ibutamoren (MK-677) — 25 mg/mL 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 159752-10-0Copy Chemical Formula C27H36N4O5SCopy 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) For laboratory research use only. Not for human or animal consumption. View certificates of analysis Independently verified 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. LGD-403397.29% pure Most recent batch certificate of analysis for LGD-4033, issued by MZ Biolabs (Tucson, AZ). Tap to view full size. MK-67799.87% pure Most recent batch certificate of analysis for MK-677, issued by MZ Biolabs (Tucson, AZ). Tap to view full size. See all certificates of analysis Storage & handling Both bottles are built to preserve compound integrity throughout your research timeline. Storage: Keep in a cool, dry place away from direct sunlight to maximize shelf life. UV-resistant glass bottles with fixed glass droppers to minimize degradation and avoid plasticizer (BPA) leaching. Tamper-proof seals to ensure integrity in transit. Graduated 1 mL glass pipette included with each bottle for precise measurement. Evaporation-resistant formulation and packaging for stable storage. Sourcing & quality Why source this stack from Sports Technology Labs 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. 3). Third-party tested & certified Both 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. Research context What is in this stack? Component 1 LGD-4033 (Ligandrol) 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. 1). Component 2 MK-677 (Ibutamoren) 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. 2). Both 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. Regulatory & compliance status Important regulatory information Not approved for human use LGD-4033 and MK-677 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 Both are prohibited by the World Anti-Doping Agency: 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. 4). Legal status for research In the United States, neither is a controlled substance and both may be legally purchased and possessed for laboratory research use. Our position Sports Technology Labs are chemical suppliers, not medical providers. We do not condone or encourage consumer use of research compounds. Citations Scientific references Basaria S, et al. The safety, pharmacokinetics, and effects of LGD-4033, a novel nonsteroidal oral, selective androgen receptor modulator, in healthy young men. J Gerontol A Biol Sci Med Sci. 2013;68(1):87–95. Patchett AA, et al. Design and biological activities of L-163,191 (MK-0677): a potent, orally active growth hormone secretagogue. Proc Natl Acad Sci USA. 1995;92(15):7001–7005. Van Wagoner RM, et al. Chemical composition and labeling of substances marketed as SARMs and sold via the internet. JAMA. 2017;318(20):2004–2010. WADA Prohibited List (2025), Sections S1 (Anabolic Agents — SARMs) and S2 (Peptide Hormones, Growth Factors, Related Substances and Mimetics). WADA.org. 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. {“@context”:”https://schema.org”,”@type”:”ChemicalSubstance”,”name”:”Ligandrol (LGD-4033)”,”alternateName”:[“LGD-4033″,”Ligandrol”,”VK5211″,”Anabolicum”],”identifier”:[{“@type”:”PropertyValue”,”propertyID”:”CAS”,”value”:”1165910-22-4″}],”molecularFormula”:”C14H12F6N2O”,”molecularWeight”:”338.26 g/mol”,”description”:”Liquid Ligandrol (LGD-4033), 10 mg/mL, a non-steroidal selective androgen receptor modulator (SARM) supplied for laboratory research use only. 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