Liquid MK-777 (Acetamoren) 20 mg/mL

.stl-pdp{
–c-logo:#062021;
–c-deep:#081c17;
–c-forest:#0a3721;
–c-green:#0ea43c;
–c-lime:#91c72e;
–c-grey:#e0e0e0;
–c-white:#ffffff;
–c-ink:#0d2a22;
–c-mut:#52635c;
–c-line:#e3e9e6;
–c-line-d:rgba(255,255,255,.14);
–c-mut-d:#aebfb7;

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{display:block!important}
.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)}

.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)}

.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)}

.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 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}
.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}

.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)}

.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)}

.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}

.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)}

.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{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}}

.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)}
.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

20 mg/mL liquidOne 30 mL bottle, labeled at 20 mg/mL (600 mg nominal total).

MK-777 / AcetamorenProduct naming, chemical identifiers and batch documentation available for research selection.

Independently verifiedPublished MZ Biolabs report: 99.12% HPLC purity for lot 2026-01-26.

Research use onlySupplied exclusively for laboratory investigation and development.

MK-777 (Acetamoren)Published COA: 99.12%

See all certificates of analysis

Why source MK-777 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 research androgen-receptor compounds and reported wide gaps between labels and contents.

Source: Van Wagoner et al., JAMA, 2017 (ref. 3).

Verified by MZ Biolabs (Tucson, AZ), an accredited US laboratory, via HPLC and mass spectrometry.

Suspended in a dual-solvent carrier system selected for this compound and bottled in America.

Prevents BPA leaching and avoids contamination from external tools.

Transparent business, standard payment methods, no misrepresentation.

What is MK-777?

MK-777 and Acetamoren are the names used for this STL research product and on its published laboratory report. The report lists CAS 950841-87-9. Chemical identifiers and sample purity help with material selection, but do not establish biological activity, selectivity or equivalence to another compound.

This listing describes the supplied research material and its documentation. It does not establish that MK-777 is more potent, safer or more effective than MK-677. Results from MK-677 studies should not be presented as results for MK-777.

MK-777 is an experimental research chemical, supplied strictly for laboratory research. Sports Technology Labs makes no claims regarding its effects, and nothing in this listing should be interpreted as describing outcomes in humans or animals.

MK-777 vs. MK-677: what to compare

MK-777 (Acetamoren) and MK-677 (Ibutamoren) are separate product identifiers in the STL catalog. Similar naming does not demonstrate equivalent composition or biological activity. The original MK-0677 / L-163,191 study concerns MK-677, not this MK-777 product. For a material comparison, review each product’s identity, labeled concentration, solvent system and lot-specific COA rather than transferring study findings between them.

Compare the MK-677 (Ibutamoren) product specifications with the MK-777 specifications above. Choose research materials against your laboratory’s documented requirements, not an assumed interchangeable name.

MK-777 identity and testing FAQs

Select for laboratory research: Compare the MK-777 specifications, review the published batch COA, and confirm the supplied lot before placing a research-material order. Not for human or animal use.

Scientific references

1. 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.
2. National Center for Biotechnology Information. PubChem Compound Summary: N-Acetyl Ibutamorelin, CID 57595228, CAS 950841-87-9. Formula and molecular weight reference; not pharmacological evidence for the MK-777 product.
3. 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.
4. WADA Prohibited List (2025), Section 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”:”MK-777 (Acetamoren)”,”alternateName”:[“MK-777″,”Acetamoren”,”MK777″],”identifier”:[{“@type”:”PropertyValue”,”propertyID”:”CAS”,”value”:”950841-87-9″}],”molecularFormula”:”C29H38N4O6S”,”molecularWeight”:”570.70 g/mol”,”description”:”Liquid research material supplied as MK-777 (Acetamoren), labeled at 20 mg/mL. Published MZ Biolabs COA reports 99.12% HPLC purity for lot 2026-01-26, analyzed February 10, 2026. Laboratory research only.”}

(function(){
var root=document.currentScript&&document.currentScript.closest(‘[data-stl-spec]’);
if(!root){var all=document.querySelectorAll(‘[data-stl-spec]’);root=all[all.length-1];}
if(!root||root.dataset.stlInit)return;root.dataset.stlInit=’1′;
root.classList.remove(‘stl-pdp–nojs’);
var tabs=[].slice.call(root.querySelectorAll(‘[role=”tab”]’));
var panels=tabs.map(function(t){return root.querySelector(‘#’+t.getAttribute(‘aria-controls’));});
function select(i){tabs.forEach(function(t,j){var on=j===i;t.setAttribute(‘aria-selected’,on?’true’:’false’);t.tabIndex=on?0:-1;if(panels[j])panels[j].hidden=!on;});}
tabs.forEach(function(t,i){
t.addEventListener(‘click’,function(){select(i);});
t.addEventListener(‘keydown’,function(e){var n;
if(e.key===’ArrowRight’||e.key===’ArrowDown’)n=(i+1)%tabs.length;
else if(e.key===’ArrowLeft’||e.key===’ArrowUp’)n=(i-1+tabs.length)%tabs.length;
else if(e.key===’Home’)n=0;else if(e.key===’End’)n=tabs.length-1;else return;
e.preventDefault();select(n);tabs[n].focus();});
});
root.querySelectorAll(‘[data-stl-copy]’).forEach(function(btn){
btn.addEventListener(‘click’,function(){var v=btn.getAttribute(‘data-stl-copy’);
var done=function(){btn.dataset.copied=’1′;var o=btn.textContent;btn.textContent=’Copied’;setTimeout(function(){btn.dataset.copied=”;btn.textContent=o;},1400);};
if(navigator.clipboard&&navigator.clipboard.writeText){navigator.clipboard.writeText(v).then(done).catch(done);}
else{var ta=document.createElement(‘textarea’);ta.value=v;document.body.appendChild(ta);ta.select();try{document.execCommand(‘copy’);}catch(e){}document.body.removeChild(ta);done();}
});
});
})();

(function(){var s=document.querySelectorAll(‘[data-stl-spec]’);var el=s[s.length-1];if(el&&!el.dataset.stlInit)el.classList.add(‘stl-pdp–nojs’);})();