Description
.stl-pdp{
/* —- Brand palette (from STL brand sheet) —- */
–c-logo:#062021;
–c-deep:#081c17;
–c-forest:#0a3721;
–c-green:#0ea43c;
–c-lime:#91c72e;
–c-grey:#e0e0e0;
–c-white:#ffffff;
–c-ink:#0d2a22; /* body text on white */
–c-mut:#52635c; /* muted text on white */
–c-line:#e3e9e6; /* hairline on white */
–c-line-d:rgba(255,255,255,.14); /* hairline on dark */
–c-mut-d:#aebfb7; /* muted text on dark */
max-width:1000px;margin:0 auto;color:var(–c-ink);
font-family:”Helvetica Neue”,Arial,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
line-height:1.6;-webkit-font-smoothing:antialiased;
}
.stl-pdp *{box-sizing:border-box}
.stl-pdp h2,.stl-pdp h3{letter-spacing:-.02em;line-height:1.15;color:var(–c-logo)}
.stl-pdp h2{font-size:clamp(1.5rem,3.4vw,2.1rem);font-weight:800;margin:0 0 .5rem}
.stl-pdp h3{font-size:1.18rem;font-weight:800;margin:0 0 .35rem}
.stl-pdp p{margin:0 0 1rem}
.stl-pdp .eyebrow{display:inline-block;font-size:.74rem;font-weight:800;letter-spacing:.14em;
text-transform:uppercase;color:var(–c-green);margin-bottom:.7rem}
.stl-pdp .eyebrow–lime{color:var(–c-lime)}
.stl-pdp a{color:var(–c-green);text-decoration:underline;text-underline-offset:2px;font-weight:600}
.stl-pdp section{padding:46px 4px}
.stl-pdp section + section{border-top:1px solid var(–c-line)}
/* ———- BUTTONS ———- */
.stl-pdp .stl-btn{display:inline-block;background:var(–c-green);color:#fff;text-decoration:none;font-weight:800;
font-size:.95rem;padding:13px 24px;border-radius:11px;transition:transform .15s,background .18s;border:0;cursor:pointer}
.stl-pdp .stl-btn:hover{background:#0bbf45;color:#fff;transform:translateY(-1px)}
/* ———- HIGHLIGHT CHIPS ———- */
.stl-grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.stl-chip{background:var(–c-white);border:1px solid var(–c-line);border-radius:14px;padding:20px 18px}
.stl-chip svg{width:26px;height:26px;color:var(–c-green);margin-bottom:10px}
.stl-chip b{display:block;color:var(–c-logo);font-size:.98rem;margin-bottom:3px}
.stl-chip span{font-size:.86rem;color:var(–c-mut)}
/* ———- SPEC CARD (tabbed) — light treatment ———- */
.stl-spec{background:#fff;border:1px solid var(–c-line);border-radius:18px;overflow:hidden;color:var(–c-ink);
box-shadow:0 1px 2px rgba(6,32,33,.04),0 14px 40px rgba(10,55,33,.08)}
.stl-spec__tabs{display:flex;gap:4px;background:#f1f6f3;padding:7px;flex-wrap:wrap;border-bottom:1px solid var(–c-line)}
.stl-spec__tab{appearance:none;border:0;background:transparent;cursor:pointer;font:inherit;font-weight:700;
font-size:.92rem;color:var(–c-mut);padding:11px 18px;border-radius:10px;transition:background .18s,color .18s;
flex:1 1 auto;min-width:120px;text-align:center}
.stl-spec__tab:hover{color:var(–c-logo)}
.stl-spec__tab[aria-selected=”true”]{background:var(–c-forest);color:#fff;box-shadow:0 3px 12px rgba(10,55,33,.28)}
.stl-spec__tab:focus-visible{outline:3px solid var(–c-green);outline-offset:2px}
.stl-spec__panel{padding:28px clamp(20px,3vw,34px) 34px}
.stl-spec__panel[hidden]{display:none}
.stl-spec__table{width:100%;border-collapse:collapse;font-size:.95rem}
.stl-spec__table + .stl-spec__table{margin-top:30px}
.stl-spec__table caption{text-align:left;font-weight:800;color:var(–c-logo);font-size:1.06rem;padding-bottom:16px}
.stl-spec__table th,.stl-spec__table td{text-align:left;padding:13px 4px;border-bottom:1px solid var(–c-line);vertical-align:top}
.stl-spec__table tr:last-child th,.stl-spec__table tr:last-child td{border-bottom:0}
.stl-spec__table th{width:38%;font-weight:700;color:var(–c-ink)}
.stl-spec__table td{color:var(–c-mut)}
.stl-spec__table tbody tr:hover{background:#f6faf8}
.stl-spec__table sub{font-size:.72em}
.stl-copy{display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap}
.stl-copy__btn{appearance:none;border:1px solid var(–c-line);background:#fff;border-radius:7px;
cursor:pointer;font:inherit;font-size:.74rem;font-weight:700;color:var(–c-green);padding:3px 9px;transition:background .15s,border-color .15s}
.stl-copy__btn:hover{background:#f1f6f3;border-color:var(–c-green)}
.stl-copy__btn:focus-visible{outline:2px solid var(–c-green);outline-offset:1px}
.stl-copy__btn[data-copied=”1″]{color:#fff;background:var(–c-green);border-color:var(–c-green)}
.stl-trust{display:grid;gap:13px}
.stl-trust__row{display:flex;gap:13px;align-items:flex-start;padding:15px 17px;background:#f4f8f5;border-radius:12px}
.stl-trust__ic{flex:0 0 auto;width:22px;height:22px;color:var(–c-green);margin-top:1px}
.stl-trust__row b{color:var(–c-logo)}
.stl-trust__row p{margin:4px 0 0;font-size:.9rem;color:var(–c-mut)}
.stl-pill{display:inline-block;background:var(–c-lime);color:#062021;font-size:.76rem;font-weight:800;padding:3px 11px;border-radius:999px;margin-left:8px;vertical-align:middle}
.stl-spec h3{color:var(–c-logo)}
.stl-spec .stl-sub{color:var(–c-mut);font-size:.92rem;margin:0 0 18px}
.stl-list{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.stl-list li{display:flex;gap:12px;align-items:flex-start;font-size:.94rem;color:var(–c-ink)}
.stl-list li b{color:var(–c-logo)}
.stl-list svg{flex:0 0 auto;width:18px;height:18px;color:var(–c-green);margin-top:3px}
.stl-spec a.stl-btn{margin-top:20px}
/* ———- COA IMAGE ———- */
.stl-coa{margin:6px 0 24px}
.stl-coa img{display:block;width:100%;height:auto;border:1px solid var(–c-line);border-radius:12px;background:#fff}
.stl-coa figcaption{font-size:.84rem;color:var(–c-mut);margin-top:8px}
.stl-coa-head{display:flex;align-items:center;flex-wrap:wrap;margin:26px 0 10px}
.stl-coa-head h3{margin:0}
/* ———- QUALITY / EEAT ———- */
.stl-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:22px 0 6px}
.stl-stat{background:var(–c-deep);color:#fff;border-radius:14px;padding:20px 18px;text-align:left}
.stl-stat b{display:block;font-size:1.7rem;font-weight:800;color:var(–c-lime);line-height:1}
.stl-stat span{display:block;font-size:.82rem;color:var(–c-mut-d);margin-top:7px}
.stl-feat{display:grid;grid-template-columns:1fr 1fr;gap:14px 30px;margin-top:8px}
.stl-feat div{display:flex;gap:11px;align-items:flex-start}
.stl-feat svg{flex:0 0 auto;width:19px;height:19px;color:var(–c-green);margin-top:3px}
.stl-feat b{color:var(–c-logo)}
.stl-feat p{margin:2px 0 0;font-size:.9rem;color:var(–c-mut)}
/* ———- COMPONENT (STACK) CARDS ———- */
.stl-comp{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:8px}
.stl-comp__card{background:#fff;border:1px solid var(–c-line);border-radius:16px;padding:24px 22px}
.stl-comp__card .eyebrow{margin-bottom:.4rem}
.stl-comp__card h3{margin:0 0 .5rem}
/* ———- REGULATORY BAND ———- */
.stl-reg{background:var(–c-deep);color:#fff;border-radius:18px;padding:clamp(26px,4vw,40px)}
.stl-reg h2{color:#fff}
.stl-reg .eyebrow{color:var(–c-lime)}
.stl-reg__grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.stl-reg__card{background:rgba(255,255,255,.05);border:1px solid var(–c-line-d);border-radius:12px;padding:18px 20px}
.stl-reg__card b{color:var(–c-lime);display:block;margin-bottom:5px;font-size:.95rem}
.stl-reg__card p{margin:0;font-size:.9rem;color:var(–c-grey)}
/* ———- REFERENCES ———- */
.stl-refs{font-size:.84rem;color:var(–c-mut);counter-reset:r;list-style:none;padding:0;margin:0;display:grid;gap:9px}
.stl-refs li{padding-left:30px;position:relative}
.stl-refs li::before{counter-increment:r;content:counter(r);position:absolute;left:0;top:0;
width:21px;height:21px;background:var(–c-forest);color:var(–c-lime);border-radius:6px;
font-size:.72rem;font-weight:800;display:flex;align-items:center;justify-content:center}
/* ———- DISCLAIMER ———- */
.stl-note{margin-top:8px;padding:16px 18px;border-left:4px solid var(–c-green);background:#f2f7f4;
border-radius:0 10px 10px 0;font-size:.85rem;color:var(–c-mut)}
.stl-note b{color:var(–c-logo)}
/* ———- NO-JS FALLBACK ———- */
.stl-pdp–nojs .stl-spec__tabs{display:none}
.stl-pdp–nojs .stl-spec__panel[hidden]{display:block}
.stl-pdp–nojs .stl-spec__panel + .stl-spec__panel{border-top:1px solid var(–c-line)}
@media (max-width:760px){
.stl-grid4{grid-template-columns:1fr 1fr}
.stl-stats{grid-template-columns:1fr 1fr}
.stl-feat,.stl-reg__grid,.stl-comp{grid-template-columns:1fr}
.stl-spec__table th{width:46%}
}
@media (max-width:440px){.stl-grid4{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){.stl-pdp *{transition:none!important}}
/* ———- READABILITY ———- */
.stl-pdp{font-size:16px}
.stl-pdp p,.stl-pdp li,.stl-pdp td,.stl-pdp th,.stl-pdp .stl-spec__table{font-size:16px;line-height:1.65}
.stl-pdp .stl-chip span,.stl-pdp .stl-sub,.stl-pdp .stl-stat span,.stl-pdp .stl-feat p,.stl-pdp .stl-reg__card p,.stl-pdp .stl-trust__row p,.stl-pdp .stl-refs li,.stl-pdp .stl-note,.stl-pdp .stl-copy__btn,.stl-pdp .stl-btn,.stl-pdp .stl-spec__tab{font-size:16px}
.stl-pdp h3{font-size:1.4rem}
.stl-pdp h2{font-size:clamp(2rem,3vw,2.5rem)}
/* ———- FONT FLOOR: nothing below 14px, desktop + mobile ———- */
.stl-pdp .eyebrow,.stl-pdp .eyebrow–lime{font-size:14px}
.stl-pdp .stl-pill{font-size:14px}
.stl-pdp .stl-coa figcaption{font-size:14px}
.stl-pdp .stl-refs li::before{font-size:14px}
.stl-pdp .stl-spec__table sub{font-size:14px}
.stl-pdp .stl-spec__table caption{font-size:18px}
Key highlights
Two-bottle research bundleOne 30 mL bottle each of LGD-4033 and MK-677, supplied together at a bundle discount.
10 & 25 mg/mLLGD-4033 at 10 mg/mL (300 mg) and MK-677 at 25 mg/mL (750 mg), each with 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.
Product specifications
| 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 97.29% (HPLC) |
| 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) |
For laboratory research use only. Not for human or animal consumption.
Independently verified
Each compound in this bundle is analyzed by an accredited US third-party laboratory before it ships.
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.
Our third-party certificates of analysis are published on our website — no login required.
LGD-403397.29% pure
MK-67799.87% pure
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.
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.
Source: Van Wagoner et al., JAMA, 2017 (ref. 3).
Both compounds verified by MZ Biolabs (Tucson, AZ), an accredited US laboratory, via HPLC and mass spectrometry.
Suspended in the highest grade carrier and bottled in America.
Prevents BPA leaching and avoids contamination from external tools.
Transparent business, standard payment methods, no misrepresentation.
What is in this stack?
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).
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.
Important regulatory information
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.
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).
In the United States, neither is a controlled substance and both may be legally purchased and possessed for laboratory research use.
Sports Technology Labs are chemical suppliers, not medical providers. We do not condone or encourage consumer use of research compounds.
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.
