Source comparison
Real Peptides CJC-1295 vs Competitors: Quality Comparison
Purity Verification Third-party HPLC + mass spec on every batch HPLC on production lots (batch sampling) Supplier-generated CoA, no third-party Real Peptides' per-batch verification eliminates the 8–15% purity variance common in batch-sampled suppliers. Critic
This comparison does not assign a generated winner or score.
- Purity Verification
- Third-party HPLC + mass spec on every batch
- HPLC on production lots (batch sampling)
- Supplier-generated CoA, no third-party
- Real Peptides' per-batch verification eliminates the 8–15% purity variance common in batch-sampled suppliers. Critical for dose-dependent research
- Amino-Acid Sequencing
- Full sequence confirmation via Edman degradation or tandem MS
- Molecular weight confirmation only
- Not tested
- Sequence verification prevents substitution errors that mass spec alone cannot detect. Ensures biological activity matches target peptide
- Endotoxin Testing
- LAL assay on all batches, <1 EU/mg guaranteed
- Tested on request or periodic sampling
- Not routinely tested
- Endotoxins cause inflammatory interference in cell culture and animal models. Absence of testing = uncontrolled experimental variable
- Cold-Chain Shipping
- Insulated packaging with temp data loggers, 48-hour cold maintenance
- Ice packs with expedited shipping
- Standard shipping, no thermal protection
- Temperature excursions above 8°C cause irreversible aggregation. Real Peptides' logged cold-chain prevents this, competitors rely on speed alone
- Reconstitution Stability Data
- Peptide-specific stability profiles provided (degradation rate, optimal pH, storage duration)
- Generic 'refrigerate after mixing' guidance
- No reconstitution guidance
- Stability data allows researchers to time experiments around peptide half-life in solution. Generic guidance assumes all peptides behave identically (they don't)
- Moisture Content
- <3% verified via Karl Fischer titration
- Not disclosed or <5% unverified
- High moisture content accelerates lyophilised peptide degradation during storage. <3% is the pharmaceutical standard for long-term stability