Source comparison
Real Peptides MK-677 vs Competitors Quality: Third-Party Verification Comparison
Third-party HPLC testing Every batch submitted to independent lab; COA published with batch number Single COA from 2024 reused across all batches In-house testing only; no independent verification Only Real Peptides proves purity for each production run Synthe
This comparison does not assign a generated winner or score.
- Third-party HPLC testing
- Every batch submitted to independent lab; COA published with batch number
- Single COA from 2024 reused across all batches
- In-house testing only; no independent verification
- Only Real Peptides proves purity for each production run
- Synthesis method
- Small-batch cGMP synthesis in FDA-registered facility
- Bulk synthesis in shared reactors
- Unknown; no manufacturing transparency
- Small-batch prevents cross-contamination other methods miss
- Purity verification
- 99%+ confirmed by HPLC + LC-MS on every batch
- 95–98% claimed; actual purity unverified after initial batch
- 'Pharmaceutical grade' claimed; no analytical data
- Real Peptides' dual verification catches synthesis errors single-method testing misses
- Storage protocol
- Cold-chain -20°C from synthesis through shipping
- Ambient warehouse storage; no cold-chain documentation
- Room-temperature storage confirmed on shipping label
- Temperature excursions degrade peptides 2–4% per month. Cold-chain isn't optional
- COA traceability
- Batch-specific COA provided on request; matches vial label
- Generic COA with no batch number
- No COA available
- Batch traceability is the only way to verify what you actually received