MK-777
MK-777 is a marketed name often associated with acetamoren. Acetamoren has a supplier chemical record and batch certificate, but those records do not establish that acetamoren and MK-777 are the same development compound. The cited sources also lack primary pharmacology or clinical evidence for MK-777.
Unresolved marketed compound identity
- LGC/TRC publishes an acetamoren structure and a certificate for its own batch.
- The certificate does not establish MK-777 code provenance, receptor activity or the identity of another vendor’s product.
- MK-677 is ibutamoren; MK-0777 is a different GABA-receptor research drug.
- Human half-life, bioavailability and claimed superiority remain unverified.
Is there an actual chemical record for acetamoren?
A February 25, 2026 LGC/Toronto Research Chemicals certificate identifies acetamoren, catalog A398010, CAS 950841-87-9, with formula C29H38N4O6S and a molecular structure.
The supplier reports NMR/MS conformity, elemental analysis and 98.55% HPLC purity for its own batch. That is a published chemical record. It contains no receptor assay, animal efficacy, human PK or original MK-777 development claim, and it does not authenticate another supplier’s material.
LGC / Toronto Research Chemicals acetamoren certificate, 2026
Analytical identity or detection study
LGC / Toronto Research Chemicals acetamoren certificate, 2026. https://www.lgcstandards.com/medias/sys_master/root/h34/h79/11199517917214/COA_TRC-A398010-100MG_ST-WB-CERT-7170728-1-1-1/COA-TRC-A398010-100MG-ST-WB-CERT-7170728-1-1-1.PDF
The supplier’s February 25, 2026 certificate identifies catalog A398010, acetamoren CAS 950841-87-9, formula C29H38N4O6S and a molecular structure. It reports NMR/MS conformity, elemental analysis and 98.55% HPLC purity for its own batch. This directly establishes a published supplier chemical record. It contains no receptor assay, pharmacokinetic experiment, animal efficacy, human trial or MK-777 originator claim. Supplier analysis is not independent validation of other vendors.
Supplier certificate only; it does not establish clinical evidence.
Read the original sourceHas MK-777 or acetamoren been tested in people?
PubMed and ClinicalTrials.gov list no matching clinical program under the exact name MK-777.
The cited chemical and retail records do not verify a primary efficacy paper, an originator, or a relationship between MK-777 and ibutamoren or acetamoren. Differently named or unindexed work could be missed. The supplier certificate alone does not establish pharmacological activity.
LGC / Toronto Research Chemicals acetamoren certificate, 2026
Analytical identity or detection study
LGC / Toronto Research Chemicals acetamoren certificate, 2026. https://www.lgcstandards.com/medias/sys_master/root/h34/h79/11199517917214/COA_TRC-A398010-100MG_ST-WB-CERT-7170728-1-1-1/COA-TRC-A398010-100MG-ST-WB-CERT-7170728-1-1-1.PDF
The supplier’s February 25, 2026 certificate identifies catalog A398010, acetamoren CAS 950841-87-9, formula C29H38N4O6S and a molecular structure. It reports NMR/MS conformity, elemental analysis and 98.55% HPLC purity for its own batch. This directly establishes a published supplier chemical record. It contains no receptor assay, pharmacokinetic experiment, animal efficacy, human trial or MK-777 originator claim. Supplier analysis is not independent validation of other vendors.
Supplier certificate only; it does not establish clinical evidence.
Read the original sourcePubMed · no MK-777 record
PubMed records
PubMed records for MK-777, MK777, and acetamoren.
PubMed lists no indexed record under MK-777 or MK777. The cited CAS and acetyl-ibutamoren records are chemical or retail listings, not primary efficacy or originator publications for MK-777.
Read the original sourcePubMed and ClinicalTrials.gov · no MK-777 record
Literature and trial registry records
PubMed and ClinicalTrials.gov exact-name records for MK-777 and acetamoren.
PubMed lists no indexed article and ClinicalTrials.gov lists no study under the exact name MK-777.
- Participants / model
- PubMed and ClinicalTrials.gov records
Is it MK-0777 or MK-677?
Those are separate, documented research compounds. MK-0777 was studied as a GABA-A receptor drug in schizophrenia; MK-677 is ibutamoren.
Neither record identifies an ingredient called MK-777.
MK-0777 is a different, characterized research drug
Randomized clinical study of a different compound
Buchanan RW et al. Biological Psychiatry. 2011. PMID 21145041.
MK-0777 was studied as a GABA-A alpha2/alpha3 partial agonist in schizophrenia.
- Participants / model
- 60 people with schizophrenia
- Follow-up
- 4 weeks
- Study design
- Randomized double-blind placebo study
This study concerns a different code name; its mechanism and clinical results do not apply to MK-777.
Read the original sourceWhat supports the claims that it is better than MK-677?
The cited records provide no head-to-head, receptor, pharmacokinetic, or human outcome dataset. Claims of better absorption, less appetite, less glucose disruption, or a longer effect remain unsubstantiated.
The distinction is between a characterized supplier sample and a validated drug-development record. MK-777's formula and half-life remain unresolved because the code-to-chemical link has not been established.
LGC / Toronto Research Chemicals acetamoren certificate, 2026
Analytical identity or detection study
LGC / Toronto Research Chemicals acetamoren certificate, 2026. https://www.lgcstandards.com/medias/sys_master/root/h34/h79/11199517917214/COA_TRC-A398010-100MG_ST-WB-CERT-7170728-1-1-1/COA-TRC-A398010-100MG-ST-WB-CERT-7170728-1-1-1.PDF
The supplier’s February 25, 2026 certificate identifies catalog A398010, acetamoren CAS 950841-87-9, formula C29H38N4O6S and a molecular structure. It reports NMR/MS conformity, elemental analysis and 98.55% HPLC purity for its own batch. This directly establishes a published supplier chemical record. It contains no receptor assay, pharmacokinetic experiment, animal efficacy, human trial or MK-777 originator claim. Supplier analysis is not independent validation of other vendors.
Supplier certificate only; it does not establish clinical evidence.
Read the original sourcePubMed · no MK-777 record
PubMed records
PubMed records for MK-777, MK777, and acetamoren.
PubMed lists no indexed record under MK-777 or MK777. The cited CAS and acetyl-ibutamoren records are chemical or retail listings, not primary efficacy or originator publications for MK-777.
Read the original sourceStudies and sources
PubMed and ClinicalTrials.gov · no MK-777 record
Literature and trial registry records
PubMed and ClinicalTrials.gov exact-name records for MK-777 and acetamoren.
PubMed lists no indexed article and ClinicalTrials.gov lists no study under the exact name MK-777.
- Participants / model
- PubMed and ClinicalTrials.gov records
MK-0777 is a different, characterized research drug
Randomized clinical study of a different compound
Buchanan RW et al. Biological Psychiatry. 2011. PMID 21145041.
MK-0777 was studied as a GABA-A alpha2/alpha3 partial agonist in schizophrenia.
- Participants / model
- 60 people with schizophrenia
- Follow-up
- 4 weeks
- Study design
- Randomized double-blind placebo study
This study concerns a different code name; its mechanism and clinical results do not apply to MK-777.
Read the original sourceLGC / Toronto Research Chemicals acetamoren certificate, 2026
Analytical identity or detection study
LGC / Toronto Research Chemicals acetamoren certificate, 2026. https://www.lgcstandards.com/medias/sys_master/root/h34/h79/11199517917214/COA_TRC-A398010-100MG_ST-WB-CERT-7170728-1-1-1/COA-TRC-A398010-100MG-ST-WB-CERT-7170728-1-1-1.PDF
The supplier’s February 25, 2026 certificate identifies catalog A398010, acetamoren CAS 950841-87-9, formula C29H38N4O6S and a molecular structure. It reports NMR/MS conformity, elemental analysis and 98.55% HPLC purity for its own batch. This directly establishes a published supplier chemical record. It contains no receptor assay, pharmacokinetic experiment, animal efficacy, human trial or MK-777 originator claim. Supplier analysis is not independent validation of other vendors.
Supplier certificate only; it does not establish clinical evidence.
Read the original sourcePubMed · no MK-777 record
PubMed records
PubMed records for MK-777, MK777, and acetamoren.
PubMed lists no indexed record under MK-777 or MK777. The cited CAS and acetyl-ibutamoren records are chemical or retail listings, not primary efficacy or originator publications for MK-777.
Read the original sourceWhy is MK-777 in D tier?
D, provisional. Acetamoren has a supplier chemical record, but its link to the marketed MK-777 code remains unverified. No cited study establishes better effects or safety than MK-677.